Hi HLBB,
I'm Rodrigo and I will help you.
This shortcut already existed on Windows 10, it is not new on Windows 11.
There is no setting on Windows to disable this shortcut, but you can use PowerToys to disable keyboard shortcuts. Download it at the link below.
https://github.com/microsoft/PowerToys/releases...
After installing PowerToys, open it, go to Keyboard Manager > Remap a shortcut.
On "Physical shortcut" press "Type" and press the Windows + Space Shortcut, on " Mapped to" select "Disable" on the dropdown menu.