I am sure I had same issue with Windows 10 and solved it. Now I can't solve it with Windows 11.
I have English (United Kingdom) language which is also locale language. I don't have English (United States) anywhere - see pictures.
However my keyboard with English UK is US. In Windows 10 it was not a problem - I had only one keyboard (US) with English UK language.
In Windows 11 I have now two keyboards if I use switch shortcut but in the settings there is only one keyboard and I can't delete the second one as it's not there.
To recap: I want to have ENG English (United Kingdom) US keyboard and remove ENG English (United States) US keyboard. All "duplicate" questions are not applicable here because I do not have ENG English (United States) language anywhere in the system.
So again - I need UK English language with US keyboard layout and nothing else.
Removing Preview key from registry doesn't work - it is back as soon as I sign in.
Keyboard layouts when I press Ctrl+Shift
Language settings - only UK
UK Language options