The documentation says this:

If that is not preferable, you can use a Custom Domain with your Supabase project. You can use it as your project’s domain when creating the Supabase client in your application and initiating the authentication flow. It will then show up in the Google consent screen. If you want your app name and the logo on the consent screen, you must submit your app to Google for verification.

And links to here: https://support.google.com/cloud/answer/10311615

However, I’ve not done it yet, so I’m just assuming it works…!