Issue with Russian - PC keyboard layout

I also tested the behavior on my iPad through Magic Keyboard and I got the same issue. Same problem on macOS with default PC USB keyboard.

So, if it works correctly on Catalina (Intel), then I think that the problem is not with the macOS version, it seems like that the problem is with the how macOS working with the Apple ARM chip (keyboard driver or something like that).

Thanks for the Ukulele, I'll look into it. But now I think that this problem should be fixed by Apple, because it looks like a regression when moving to a new chip.

You are right. But the characters isn't the same, they just has similar look.

Oh, my bad, I'm on the Monterey.

Did you write these ё Ë on your iPad? They are not correct, second one (capital) has 203 code - it's not from cyrillic, it should be Ё - 1025.

Look at the image, left one from cyrillic, right one from latin - they are different.

Also I just checked Ukelele and I found that changes for tilde key isn't working - it always print ёË. My changes works fine for any other key but not for tilde, thats odd.

I tested this and got the same behavior as on my layout - the key has the same code as before. It feels like the key just hardcoded in the OS. Or maybe it's because I have an ANSI keyboard...

Only one way what I found - is modify key through Karabiner-Element from tilde to something other, then modify layout through Ukulele. But it's super dirty solution and I don't like it.

Now it works, thanks.