gp I believe Apple doesn't currently give non-Safari browsers access to implement Apple Pay on the Mac OS desktop platform. It should work on mobile though (where they let non-Safari browsers implement Apple Pay via their webkit).
GiantMicrobe Vlad Have submitted feedback to Apple regarding ApplePay on all browsers. Also SMS autofill.
ForumNinja404 Vlad It appears to work on all iOS browsers as of iOS 16. However, MacOS support is still unclear. reference