Can't acces Cloudfront distribution + S3 bucket from custom domain

Hi, I've been learning terraform, and created a S3 bucket hosting a nuxt app and a cloudfront distribution pointing to said bucket. This setup is working perfectly when accessing the bucket via the Distrib url, however I want to use a custom subdomain from a domain name I own (I'm using OVH for the domain). I've set up the DNS record like so: [xxxx.yyyy.fr] CNAME [Distrib URL]. I also created an ACM certificate pointing to said subdomain, had it validated using DNS entries, and added it to the distrib. I have the custom subdomain set up in the cloudfront Alternate Domain Names.

To note: I have set up both the certificate and alternate domain name as "xxxx.yyyy.fr" and not "*.xxxx.yyyy.fr", I don't know if that could be the issue.

Whenever I visit the subdomain, I'm getting a "This site can't be reached", "DNS_PROBE_FINISHED_NXDOMAIN". I've also checked the CNAME record propagation, and it seems to be configured properly.

I've set up the bucket Policy like so:

{
    "Version": "2008-10-17",
    "Id": "Policy",
    "Statement": [
        {
            "Effect": "Allow",
            "Principal": "*",
            "Action": "s3:GetObject",
            "Resource": "arn:aws:s3:::[REDACTED BUCKET NAME]/*"
        }
    ]
}

Here are the S3 CORS policy

[
    {
        "AllowedHeaders": [
            "*"
        ],
        "AllowedMethods": [
            "POST",
            "GET",
            "HEAD",
            "DELETE",
            "PUT"
        ],
        "AllowedOrigins": [
            "*"
        ],
        "ExposeHeaders": [],
        "MaxAgeSeconds": 0
    }
]

Any ideas as to why I can use the distrib's url but not my custom subdomain ? Thanks.