Anecdotal and likely not very helpful, when I was running a laptop with a 2060, I regularly had freezing issues launching steam, that would freeze the entire desktop on whichever I display I launched it on for anywhere from 10 seconds to a minute. The same issue occurred across multiple Linux distros running multiple Nvidia proprietary driver versions.
I built a desktop with an AMD GPU to solve the problem and it worked. I really wish I could give you something better than that.
I guess the takeaway for me is despite making some strides in last couple years nvidia is still just kinda janky on Linux. Good luck getting to the bottom of it.