08/03/2023, 9:36 PM refers to importing an API Gateway custom domain mapping by using the valus of the API mapping identifier and the domain name. I don't know how to retrieve the mapping identifer or what it is. I tried a variety of identifiers but I am not hitting the right combination. Always, resource '...' does not exist.
Can't find in AWS console. But
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aws --region=us-east-1 apigatewayv2 get-api-mappings --domain-name <domain-name>