i cannot fit a ssd in my phone, and i only have 16gigs of soldered emmc so yeah flatpak isn't an option for me, i keep my aur packages...
can you provide more information ? like what are you trying to do ? if this happen while launching steam itself or something else? are you trying to launch a linux binary with proton ?
on my laptop there is a Fn key combinasion to switch between them... btw i don't think it's possible to trigger this from the Os side of thing, it is tied to the firmware...
it's not there yet but in a few years from now there is hope, a vulkan driver is in the work and the nvidia signed firmware would allow power management for newer gpu, but it's not ready yet...
its actually not windows on this post, its plasma mobile custumised if i recall correctly