I logged in to the Auth app on a new phone and my accounts won't show up

Question

This is from one Android phone to another. The thing is: I have a bunch of 2fa accounts on my old phone, where I had backup activated. I got a new phone, downloaded the app, logged into my account, and the only 2fa account that shows up there is the one from Microsoft, the one I used to log in, even after I activate backup (btw, it said there was already backup for this account, asked me if I wanted to replace it, I said yes, and nothing changed on both phones). How do I get the 2fa accounts from the app on my old phone to my new one?