Can I sign in with Google or Apple?
Yes. Press Sign in with Google or Sign in with Apple on the sign-in page. You are signed in with the email address the provider confirms.
There is one account per email address, whichever way you sign in. If Google confirms the same address you used with codes before, you land in the same account.
Apple can hide your real address and give us a forwarding one (Hide My Email). That address is a different account here: applications sent from your real address will not show in it. Sign in the same way each time, or use the email code with your real address.
If the provider does not confirm an address we can use, the sign-in page says so; use the email code instead.