Api Gateway does not generate metrics on CloudWatch

We created some API Gateway resources of type AWS::Serverless::Api with CloudFormation in the same AWS account, where all have the same value of ApiName and with the MethodSetting parameter we enable the metrics for all paths that have the different API Gateway.

After creating the API Gateway resource in the Amazon console and after a few days of running requests on the API, we only see the metrics 4XXError, 5XXError, Count, Latencies and Integration Latencies corresponding to a single API Gateway, the rest of the API Gateway did not generate any metrics in CloudWatch.

At this point, we decided to assign a different API name to each API Gateway. However, these API Gateways still do not generate metrics in CloudWatch.

Any idea about the problem we are having?