Hi,
I am actually haven the same issue on my IPad 8, using a Logitech Folio.
What is interesting, is that it does not default to the Keyboard layout, but to the system language - namely, I have a US layout keyboard on an IPad set up for German, and it is stuck to a German layout.
I tried removing all but the English language from Settings, but somehow the Folio still defaults to German.