When will Go 1.16 be available?
We don’t currently have a timeline on when Go 1.16 will be available, but you can leave a feature request for it, and you’ll be notified when we have any updates.
In the meantime, if you want to use Go 1.16 before our Go environment supports it, you can deploy your service in a Docker environment and configure your Dockerfile to use Go 1.16.
Done. Should anybody else see this and wish to vote on the feature: Go 1.16 | Feature Requests | Render
Many thanks for your concise answer.