New Features in iOS & iPadOS 15 beta 6
The bottom tab bar has been redesigned to appear below page content. An option to show the address bar at the top is also available. (81118141)
In addition to the option of showing the address bar at the top, Apple also added a toggle to "Allow Website Tinting".
It appears that Apple is walking back some of its changes to Safari based on user feedback. The third beta brought back some buttons that were initially hidden and today's beta takes that a step further with the return of the top address bar.
Please download the iClarified app or follow iClarified on Twitter, Facebook, YouTube, and RSS for further updates.