Contributing a PR to a module

Hello everyone. I’m using Simple Oauth module, and I found a functionality I would like to see, I already implemented it by replacing the original Controller.

The question is, does Drupal allows to create PRs?

Funcionality is the ability to choose in the Simple Oauth options, when using gran_type password, if you want to use username, email, or both. Because the current implementation only allows to use the username for login validation

Thanks in advance!.

Drupal version: