I recently stumbled upon platinmods dot com, don’t know whether it is safe though so a comment from someone who knows about this site more will be appreciated
I should preface this by saying I didn’t try any of the handheld gaming PCs, I watched a review of the AyaNeo 2S, it uses the same APU as the Ally and still outperform it, especially at low wattages and if I remember correctly even the steam deck at the same power level maybe you wanna check that out!
I would choose a gaming laptop over a handheld just for the versatility and upgradability, I have my eyes on the framework 16 it is very intriguing, to say the least