How to open "MetaMask" app on iOS app

#Description
I want to add an address to the app only if the user is the owner of the wallet through the MetaMask App.
I want to bring only the NFT list owned by the user.
So I want to open the MetaMask app on my app and get the address.
(Because the owner of the wallet can say that he brought the address through the MetaMask app.)

The issue describes opening MetaMask from an iOS app, obtaining the user's wallet address, and retrieving owned NFTs, but names no files, tests, or entry points. First clarify the intended integration/API and acceptance criteria; done should specify a supported wallet handoff, verified ownership, and NFT retrieval behavior.

Written by the indexing model from the issue text.