Trouble with Syncing AnkiWeb to AnkiApp

Hi, so I am trying to make sure I can access my flashcards either on the computer and on the app. I cannot find how to sync to the app. I figured out how to sync the Web to the desktop app, but not the mobile app.

It makes me sign up for two different accounts, so is syncing from Web to App not possible unless you pay for it? I tried watching the YouTube video (from 2020, so maybe it’s changed?) on how to do it and I still cannot figure it out, because I can’t find the synchronize button.

AnkiApp is not part of the Anki ecosystem.