In WWDC 2019, there was announced "in iOS 13, you can now use Apple Pay inside a WKWebView.". (#1)
But the guide of Apple Pay on the web says "In iOS, Apple Pay is supported in Safari and in SFSafariViewController objects.". (#2)
When I actually implement it, the payment was completed without any problems.
Are there any problems using Apple Pay payments on WkWebView?
WWDC2019(#1) https://developer.apple.com/videos/play/wwdc2019/518/
ApplePay on the web guide(#2) https://developer.apple.com/documentation/apple_pay_on_the_web/