I add issues here with iPad and magickeyboard to iMac :
Caps Lock issue :
There's a problem with caps lock key.
If I activate it, the characters remain in lower case. If I disable it, they change to upper case. To deactivate caps: I need to reactivate caps lock, write a character that will be capitalized, then remove caps lock.

Menu bar issue :
Click on iMac menu bar, and then move the cursor, the drop-down menu disapear and i can’t select an option.

Virtual keyboard issue :
Activate the RustDesk’s virtual keyboard or mouse control, to use floating shortcut bar for example, then the physical keyboard no longer responds correctly. It no longer writes characters and performs curious actions: for example, pressing the H key brings up the iMac desktop.
Restarting the RustDesk session doesn't change anything, you have to restart the remote iMac directly.

bug screen area 100% display :
When I use the trackpad, the mouse cursor appears; if I don't touch it, the cursor disappears after about 5 seconds.
The problem is that when I'm in 100% display mode, the screen follows the cursor as I move it. But if I don't touch the cursor, it disappears after 5 seconds, and the screen shifts to the top left zone.
If I move the cursor again, the screen returns to the area where I was.
So I have to keep moving the cursor to stay in the area of the screen I want.

Cmd + Q :
Doesn’t work unlike other combinations as cmd+c works well.

Key repeat :
Pressing and holding the delete key does not delete multiple characters; press character by character.

Sorry to have created several bug posts, I didn't know which was the best way for you