“Enable notifications” pop down on some forums doesn’t work on IOS

When I am using Brave mobile on IOS at www.glocktalk.com or www.rugerforum.net, a popdown asking to “enable notifications” appears. This persistent popdown won’t accept input and slides itself over the top of all content. There doesn’t seem to be a way to turn off this troublesome notification.

Can you help? My phone is an iPhone 12 mini. It is running iOS 15.4.1.