Some years ago, I saw a wallet called Spark that let you generate a QR-code to view in your Apple Wallet and Apple Watch Wallet. It was for receiving over lightning, not sending.
I guess with unified BIP21 QR-codes, anyone can already add a RECEIVING wallet code to Apple Wallet today.
I don't think Apple want's to be the middle man in receiving Bitcoin payments though because “tainted” coins exist in the C-suite mind, and they would rather not receive and handle those.
But Jack Mallers recently told me he wants to integrate Apple Pay into Strike, so who knows, something similar will exist soon.