Ah fuck. The best value add of google domains is that you can set email aliases (including *@domain) and redirect them to your own adresses. Guess I'm gonna have to roll my own relay.
I use catchall addresses with my cloudflare domain connected to my protonmail account. Was way easier to set up than I thought and I’d definitely recommend it.
If you’re an iOS user, any non-free tier of icloud already includes something like 3-5 email domains. Not hard to set up. It’s a nice bonus most people aren’t aware of.