We also have an issue with global endpoints, e.g. S3_MULTI_REGION_ACCESS_POINTS. They are not supposed to have a region prefix (docs), but currently do in the CDK:

$ aws ec2 describe-vpc-endpoint-services --region=us-east-1 --service-names=com.amazonaws.s3-global.accesspoint | jq '.ServiceDetails[] | .ServiceName'

"com.amazonaws.s3-global.accesspoint"

new CfnOutput(this, "endpoint", {
	value: ec2.InterfaceVpcEndpointAwsService.S3_MULTI_REGION_ACCESS_POINTS.name,
});

// TestDeployStack.endpoint = com.amazonaws.eu-west-1.s3-global.accesspoint

The region is currently always prefixed:

I haven't checked if there are other existing cases, but aws.api.global.codecatalyst is currently missing from the endpoint list, and will run into the same issue (docs)

Originally posted by @nmussy in #29524 (comment)