Welcome to FORCED Obsolsence. & destruction of Internet History. This is why 'Right to repair' needed to happen 15+ yrs ago.
1) You can get Stand-alone flash player (Yes, they try to hide it unless u know wat ur looking for) - https://www.adobe.com/support/flashplayer/debug_downloads.html
2) Not sure why you can't use the Pre-compiled .EXE version?? it's a complete win32-Executable soo.. Works for me; no Old-sk00l Trickery needed! ;)
3) GLHF