there might be an BIOS update you could try i don’t think it will fix 64 bit and even if it did 32bit apps probably take less memory for storing addresses.
on my AOD255E 64bit just works :tm:

apps like https://play.google.com/store/apps/details?id=com.parseus.codecinfo (https://apt.izzysoft.de/fdroid/index/apk/com.parseus.codecinfo) show whether or not you’ve got it, on my samsung galaxy note 20 ultra I’ve got software only :(

you can disable paging (swap) i guess apart from launching more things at the same time and letting apps know you have ram for them to cache shit (check app settings some apps do have a how much ram should we use slider like okular the kde pdf viewer) and virtualisation of multiple os’s i can’t think of much

nvidia, i swear most of the issues i experience are nvidia related in some way yeah i know using a GTX 1080 with a i7 12700k isn’t like the best idea but when given the options of use said gpu and get reasonable framerates with the games im playing (but get massive headaches when something related to the proprietary linux driver eventually breaks, and it does) or use the igpu and get unplayable framerates (or low res) or unnecessarily buy a newer gpu that isn’t that big of a jump in performance for me to justify the price I’m sticking with dealing with nvidia