[iOS] BackButtonBehavior IsEnabled - fix#28734

kubaflo merged 2 commits intodotnet:inflight/currentdotnet/maui:inflight/currentfrom

kubaflo:IsEnabled-does-not-work-in-BackButtonBehavior-fixkubaflo/maui:IsEnabled-does-not-work-in-BackButtonBehavior-fixCopy head branch name to clipboard