I created a new iOS SwiftUI App (Multiplatforms) based on the "Hello, world!" and just run it on Simulator.app (iPad Air 5th) then logged:
[UIFocus] Failed to update focus with context <UIFocusUpdateContext: 0x6000024d8140: previouslyFocusedItem=(null), nextFocusedItem=(null), focusHeading=None>. No additional info available.
macOS 12.3.1 and Xcode 13.3.1
and, I don't know if this is relevant or not, but the following logs are now also produced. It is working at the moment.
"[Assert] Using legacy initializer -[UIFocusRegion initWithFrame:] for region <_UIFocusItemRegion: 0x6000027916c0> - if this region is If this region is coming from UIKit, this is a UIKit bug."