Amazon Data Firehose Failing To Write To OpenSearch Serverless Collection

I am trying to send cloudwatch logs using Amazon Data Firehose to OpenSearch Serverless Collection. But I received this error while writing to OpenSearchServerless Collection Via FireHose (attached SC)

IAM role for Amazon Data FireHose

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "s3:AbortMultipartUpload",
                "s3:GetBucketLocation",
                "s3:GetObject",
                "s3:ListBucket",
                "s3:ListBucketMultipartUploads",
                "s3:PutObject"
            ],
            "Resource": [
                "arn:aws:s3:::demo-amazon-s3-bucket",
                "arn:aws:s3:::demo-amazon-s3-bucket/*"
            ]
        },
        {
            "Effect": "Allow",
            "Action": "aoss:*",
            "Resource": "arn:aws:aoss:us-west-2:654654323652:collection/rnp6cshlcpnjcqrz1d61"
        },
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "lambda:InvokeFunction",
                "lambda:GetFunctionConfiguration"
            ],
            "Resource": "arn:aws:lambda:us-west-2:654654323652:function:demo-lambda-function:$LATEST"
        },
        {
            "Effect": "Allow",
            "Action": [
                "kms:GenerateDataKey",
                "kms:Decrypt"
            ],
            "Resource": [
                "arn:aws:kms:us-west-2:654654323652:key/%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%"
            ],
            "Condition": {
                "StringEquals": {
                    "kms:ViaService": "s3.us-west-2.amazonaws.com"
                },
                "StringLike": {
                    "kms:EncryptionContext:aws:s3:arn": [
                        "arn:aws:s3:::%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%/*",
                        "arn:aws:s3:::%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%"
                    ]
                }
            }
        },
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "ec2:DescribeVpcs",
                "ec2:DescribeVpcAttribute",
                "ec2:DescribeSubnets",
                "ec2:DescribeSecurityGroups",
                "ec2:DescribeNetworkInterfaces",
                "ec2:CreateNetworkInterface",
                "ec2:CreateNetworkInterfacePermission",
                "ec2:DeleteNetworkInterface"
            ],
            "Resource": "*"
        },
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "es:DescribeElasticsearchDomain",
                "es:DescribeElasticsearchDomains",
                "es:DescribeElasticsearchDomainConfig",
                "es:ESHttpPost",
                "es:ESHttpPut"
            ],
            "Resource": [
                "arn:aws:es:us-west-2:654654323652:domain/%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%",
                "arn:aws:es:us-west-2:654654323652:domain/%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%/*"
            ]
        },
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "es:ESHttpGet"
            ],
            "Resource": [
                "arn:aws:es:us-west-2:654654323652:domain/%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%/_all/_settings",
                "arn:aws:es:us-west-2:654654323652:domain/%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%/_cluster/stats",
                "arn:aws:es:us-west-2:654654323652:domain/%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%/%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%/_mapping/%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%",
                "arn:aws:es:us-west-2:654654323652:domain/%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%/_nodes",
                "arn:aws:es:us-west-2:654654323652:domain/%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%/_nodes/*/stats",
                "arn:aws:es:us-west-2:654654323652:domain/%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%/_stats",
                "arn:aws:es:us-west-2:654654323652:domain/%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%/%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%/_stats"
            ]
        },
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "logs:PutLogEvents"
            ],
            "Resource": [
                "arn:aws:logs:us-west-2:654654323652:log-group:/aws/kinesisfirehose/demo-firehose-stream:log-stream:*",
                "arn:aws:logs:us-west-2:654654323652:log-group:%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%:log-stream:*"
            ]
        },
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "kinesis:DescribeStream",
                "kinesis:GetShardIterator",
                "kinesis:GetRecords",
                "kinesis:ListShards"
            ],
            "Resource": "arn:aws:kinesis:us-west-2:654654323652:stream/%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%"
        },
        {
            "Effect": "Allow",
            "Action": [
                "kms:Decrypt"
            ],
            "Resource": [
                "arn:aws:kms:us-west-2:654654323652:key/%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%"
            ],
            "Condition": {
                "StringEquals": {
                    "kms:ViaService": "kinesis.us-west-2.amazonaws.com"
                },
                "StringLike": {
                    "kms:EncryptionContext:aws:kinesis:arn": "arn:aws:kinesis:us-west-2:654654323652:stream/%FIREHOSE_POLICY_TEMPLATE_PLACEHOLDER%"
                }
            }
        }
    ]
}