There may not be as many in this forum familiar with Ubuntu or Linux.  A previous Rockstar often said it's unsupported unless it came that way from Dell.  But that is now practically irrelevant with the age of the 9020. If you try it, and it doesn't work, it won't break the machine.  I do know there's Dell Optiplex's running both Windows and Linux/IUbuntu. You do have the system requirements exceeded.
if i install Ubuntu 22.04 on my old OptiPlex 9020 mini tower, will it still work? i have 8 gb ram and i7 4790 cpu and 512 gb ssd
Ubuntu 22.04 question