The Android dev kit includes a copy of QEMU that’s set up to emulate ARM with a selection of popular screen sizes and revisions of the OS, so that you can test your app on a variety of ‘potential phones’ before you upload it to the marketplace. Snapdragons are amazingly performant CPUs for how gently they sip at the battery, but they’re not that strong in the big scheme of things - any random x86 processor should be able to emulate them while using fifty times the power. A Steam deck ought to be able to do it; the request will then be ‘we’d like to play Android games better’, which to me is a much more reasonable ask.