More on mouse cursor support in iOS 14 after the break ... APIs could then automatically translate over to Mac apps using Catalyst, which currently lacks an API for changing mouse cursor type.

By default, Windows hides the mouse cursor when you type. It is to avoid distraction. But if you do not want Windows to hide your mouse cursor, you can disable this setting.

If your mouse cursor disappears when playing games in full-screen mode on your PC, ... Type mouse in the Control Panel search bar and select Mouse from the search results.