AWS Amplify Env Variable Override

The next release 3.34.0 for the AWS Provider includes support for AWS Amplify App.

Reading the documentation (Merge pull request #15966 from ashishmohite/f-amplify-app · hashicorp/terraform-provider-aws@ead8c65 · GitHub) it is unclear about how to add an Environment Variable override to the env var map. The variable environment_variables is a 1-depth map of env name to value.

For example - this configuration does not appear to be supported.

Please could you clarify if this supported from configuration. The use case it to have different env vars for master branch to the default develop branches.

Awesome job getting Amplify in - thank you.