Eleven Rack End of Support is in 2024. So hopefully a driver update will be coming eventually, Avid is not typically fast with driver updates, so don’t hold your breath.
Official End of support dates are:
http://avid.force.com/pkb/articles/e...-support-dates
Really hope you had a clone/backup of your system drive.
I am not aware of anybody doing serious playing around/any guesses if there is anyway to get stuff running. No way I am going to Catalina any time soon.