Supabase is an open source Firebase alternative. Start your project with a Postgres database, Authentication, instant APIs, Edge Functions, Realtime subscriptions, and Storage.

Supabase

I realized that when on the web it will open a URL where a user can sign in to apple and be redirected back to the page, but if I'm building on iOS I can have a native screen appear for the user to sign in with, so presenting a url with a sign in will be a super clunky UX

I'm assuming that Supabase already handles storing the refresh tokens and doing the JWT refresh flow in the background cause GoTrue doesn't support that natively. Is there any API that I can hit with a refresh token?