Does Apple sell unlocked Iphone 15 pro phones?

Most iPhones purchased directly from Apple, in the U.S., are unlocked.

"Every iPhone you buy from us online or in an Apple Store is unlocked, with the exception of a few carrier financing options. With an unlocked iPhone, you’re free to go with the carrier of your choice."

iPhone - Buying iPhone - Apple

"Will my new iPhone be unlocked?

Yes. An iPhone purchased from apple.com is unlocked. Once your new iPhone is activated, it remains unlocked, which means you can use it with any network that provides service for iPhone. The exception is when you buy an iPhone with an AT&T Installment Plan. It will be locked to AT&T and will only work on the AT&T network for the term of your Installment Plan agreement."

Buy iPhone 15 and iPhone 15 Plus - Apple

You may want to double-check what the Apple site currently says before you buy – especially if you are going with any of the carrier financing options.

All iPhones sold directly by Apple are unlocked, unless you finance them through a carrier. And note that in the US at least, Apple is the only seller that sells unlocked phones. In the UK and EU all phones are sold unlocked by law.