Again, I am not sure how one could argue that apple does not support bitcoin payments on the iPhone. It is already possible to use a wallet app on your iPhone to send/receive bitcoin (and most altcoins). How else could apple support bitcoin payments?
In that case we can say that every device that supports the installation of a crypto wallet supports Bitcoin or some other cryptocurrency? The point here is that Apple could/should accept Bitcoin as a means of payment for its products, so customers could pay for everything on this
site with Bitcoin. Given that some important shareholders of a company like Buffett are against Bitcoin, I don't see how and why Apple should accept Bitcoin at that level.
Yes, I would generally say that most (every?) mobile devices have support for bitcoin/crypto.
You can currently buy Apple gift cards on bitrefill (and other crypto to gift card sites) using your crypto. I don't see Apple accepting bitcoin directly for their products because doing so would only add to their compliance and sales support costs, and probably would not bring in many additional sales they would otherwise have.