ability to "pin" windows on top

As a newcomer to Mac I was disappointed to find out that MacOS doesn't have the "Keep window on top" feature of Gnome etc. Windows equivalent: "Always On Top" feature of Microsoft PowerToys.
This feature would be amazing. Thanks!

This feature must be implemented by the respective application (or its developer) itself. Under macOS, you cannot manipulate windows of third-party applications in this way.

PS: Under Windows, you can do just about anything with the WinAPI, e.g. embed foreign windows in your own application (setParentWindow) etc., only with the Windows hWnd, which is sometimes an advantage, but in my view is more of a security risk.

Oh well.
Thank you very much for your quick response and your hard work developing these tools!