Set the minimum TLS version as 1.2 for API Gateway-CodePudding

I have api gateway for lambda such as

https://x6c5e11xkc.execute-api.ap-northeast-1.amazonaws.com/prod/c

Now I want to set this TLS for more than 1.2 only.

I found the document here below, but I am not sure what the custom-domain... my url is custom-domain???

Create Custom domain and assign an ACM Certificate

Finally, Select the API Mappings Tab and configure the API mappings, select API and stage.

API Mappings

Make sure that you configure your DNS to point to the API Gateway Domain name, you can use Route53 for example and add a new A (ALIAS) record.

I hope this information may be helpful