I tested an old conky script on my Unity eoan, and it works. I cannot remember the last time I played with Conky, so can’t give any advice. But, I can send you a PM with that script, if you want it for testing. Btw, mine is an older laptop with Intel graphics. No idea how Ubuntu works with Nvidia graphics.
Btw, it is good to test any app, especially the old ones on Unity Eoan, for that way we’d know what works, what don’t. Any info, good or bad is a good info!