Why did you have to transfer bitcoin? Surely you would just load your private key into the app unless I'm missing something.
Then I figured a legit apple app could generate a wallet and I could transfer the bitcoin between them. Which is what I did. The apple app indeed received it and promptly sent it off somewhere else. What's even crazier is that the apple app shows this info! You'd expect the scammer to hide the scam but I suppose it just made it easier to pass the app store inspection.
Did you try moving the crypto back to your Android wallet? Sometimes they do move to cold storage, or invest into DeFi schemes. It will be hidden in their T&C.