These are the original improved cursors created by Michiel de Boer in 2018.
Details can be found on his website and on YouTube
As Michiel doesn't include a license to the cursors, I assume they are free to use, and it should be no problem to host them here on GitHub as long as there is a reference to the original creator included..
I added the package to GitHub only as a personal backup and a way to easily deploy them to multiple computers.
Each cursor package contains a _install Posy*.inf file that can be used to install the fonts.
In the context-menu for the .inf file, simply click on Install to have them installed.
Note: in Windows 11 the option is hidden behind the Show more options entry of the context menu
Open the classic Control Panel, search/click Mouse, click Pointers and then select the Posy's Cursor * scheme from the drop-down.