Hi, I am Paulo and I'd like to help.
Do you mean to keep a window always on top? If so, you will need the PowerToys app for that. You need this tool for the shortcut Win+Ctrl+T to work.
https://learn.microsoft.com/en-us/windows/power...
You can download the tool here. It also comes with a lot of other handy tools that you might want to check out.