Hi عمار,
I'm Rodrigo and I will help you.
You can use PowerToys to disable the key on the keyboard, it applies to the on-screen keyboard and touch keyboard too.
Install Power Toys from the Microsoft Store here:
https://apps.microsoft.com/store/detail/XP89DCG...
Open Power Toys > Keyboard Manager on the left side > Remap a Key > On "Physical key" select "Type"and press Shift and on "Mapped to" select Disable on the dropdown list (first option). Press OK to save