Ok how about: when a user goes to the "Wallet" page in the menu, and taps the "+", how about supporting adding a Monero address that way? It could reuse the Payment tag people use today. But this way ...
Which protocol should we use to manage the wallet? None of our wallets are ours, we are just calling other apps or services. The UI is the easy part. Do Montero wallets have something like Nostr Wallet Connect?