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?
Could try Fedora based like Bazzite or just regular Fedora. Obviously a sample size of 2 isn’t saying much, but Fedora is less buggy with my hardware on my HP laptop and my Nvidia GPU destop.