PikaOS maybe too “hobby oriented” to expect “sleep stability”, but I understand most/all bugs to be debian or kde upstream ones. Is gnome still much better at stability? Is there a distribution that fixed sleep problems for you? open vs closed nvidia drivers?
Are there motherboard manufacturers that suck less at linux?
No issues with Debian / Ubuntu on many laptops since early 2010s, mostly with Intel graphics. I had a Vostro 1400 with Nvidia and it also resumed fine, but that was 2009-11 so the experience with the Nvidia driver from that time is likely irrelevant.