probably not, they've been building a translation layer called FEX that does x86 -> ARM, reasonable to expect it's an x86 build optimized for FEX and the hardware specs of the Frame https://github.com/FEX-Emu/FEX

but honestly who knows, they might just release an ARM native build, it's their own damn game, they were one of the earliest gaming companies to port games originally written for windows to linux, it's entirely possible they'll do a full port (am I remembering wrong internet?)

the FEX thing is underrated, I know FEX isn't new but the news that we can expect to performantly run almost our entire steam catalogue on ARM hardware is wild