Kubuntu LTS definitely didnt have it by default. And there are no system settings exposing it (or ZRAM)

Is there any way to get something like the oomd or zram that works on gpu memory? I run into gpu memory leaks more often. Itbseems to be electron usually.

GPU memory model quite different from CPU memory model, with application level explicit synchronization and coherency and so on. I don't think that transparent compression would be possible, and even if it would surely carry drastic perf downside