Try Z Fold 7 with a grip case (one with a rubber band on the back to fasten it to your palm). Grip cases make phones in general much more usable on the go, but with a foldable, it's arguably what makes you feel safe using it for laptop-grade work while walking or without a surface to rest against.

Still not a laptop, but for me it's enough that I haven't used my private laptop since getting the Fold 7 half a year ago. Extreme portability can cover for a lot of other UX problems.