The virtual keyboard can now be used under Avalonia.XPF. If the control detects non-Windows system, it replaces the Windows native API-based keyboard emulation code with WPF event routing-based one. With that, the keyboard loses several features on macOS and Linux:
Sending keyboard events to a different process will not work.
The keyboard can no longer query the OS for mapping from virtual key codes to key labels, which are used to render standard layouts. Language details are now loaded from embedded resource tables, and only a few languages have been implemented so far.
It cannot follow current input language of the OS (what you'd select from Windows taskbar), and it must be set manually.
Current list of character maps supported on non-Windows systems is: