I'm having the same problem in Xcode 13, iOS 15.
I think additional version of simulator occurs this problem.
Xcode 13 default iPhone simulator(iOS 15.0) show dynamic type slider.
But additional version simulator(iOS 14.5) didn't show that slider.
Journey36
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution