How notch traversal works on MacBooks

Tailscale now has a full windowed UI. Before that, our app had to learn how to tell you it was hidden by The Notch.

I haven't had enough menu bar icons to run into this but is it really the case that the notch just hides whatever icons happen to be behind it? Like, the OS doesn't handle this incredibly obvious edge case? Why not just put an overflow dropdown next to the notch (something Windows XP managed to figure out)? I know software quality has been going down in recent versions of macOS but this is absurd.

> I know software quality has been going down in recent versions of macOS

Note that this particular problem has existed for well over a decade. It's atrocious, but let's not pretend it's anything new.

The macbook notch has existed for a decade?
Menu bar icons overflowing. The notch just makes it a problem quicker, and in an exciting new way.