Non-standard problem with the cursor, how to display it in a full-screen game by hotkey?

Question

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In short - you need to unlock the cursor inside the game using a hotkey (to go to the second screen), below are

the details no problems arose, but there is one snag: in order to go to the action on the 2nd monitor, you need the cursor to be active on the 1st, and since in the same witcher during the cutscene you can’t open the menu, but turn off basically for a long time and oh how I don’t want to, but somehow I need to go to the second screen without disturbing the activity of the first one. Does anyone have software to do this? Personally, I myself rummaged through the entire Internet as best I could, but did not find an answer, the only similar question was this question on Habré:
How to show the cursor in the game?
There it is necessary for streaming, but the essence and solutions to our problems are the same - software for displaying the cursor, but there is not a single answer under that post, so here, I created my own ...