It's not a global toggle, but Asus definitely has options to make things more stock-Androidy — you can basically turn the Settings app back into something resembling the stock version, and a bunch of their other UI enhancements and changes are also optional.

A long time Android user wouldn't have mistaken my Zenfone 9 for a Pixel at any more than a cursory glance, but you can get it pretty close, particularly in terms of feel.