Microsoft is going to automatically upgrade you to Windows 10 22H2 whether you want it or not and whether you like it or not. https://www.techspot.com/news/98699-microsoft-automatically-upgrade-windows-10-21h2-users-after.html After Windows 10 reaches EOL in October 2025, Redmond will automatically upgrade you to the next version of Windows. The software giant has your best interests at heart!
Doesn't matter on this end. A single Windows 10 will be allowed to install it. They can't touch the 8.1's