Request POST size limits across different serverless platforms

Lambda Invoke request body payload size (RequestResponse/synchronous invocation) is max 6MB. This makes some API endpoint types (e.g. general webhook POST receivers) not feasible to use API Gateway+Lambda as the front-end. The recommendation to use upload via S3 is not always possible.

How does this compare across the other providers available via Serverless? Would be nice to have a “limits” page somewhere with links in one place.