Literally any other handheld will do. Even the more expensive ones.
The PlayStation Portal works fine under extremely specific circumstances
Forget the PlayStation Portal, we want the PS5: Tablet Edition - Dot Esports
Sony PlayStation Portal: Portable Console Review & Price at $219 — Eightify
Sony PlayStation Portal review: Portal to disappointment - Reviewed
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Sony PlayStation Portal review: flawed but fun - The Verge
PlayStation Portal review: weird but comfortable PS5 remote play - Video Games on Sports Illustrated
PS Portal Review - Is It Any Good? , ps
PlayStation Portal review — a new portable meant for the hardcore Sony base., by Ryan
PlayStation Portal review: weird but comfortable PS5 remote play - Video Games on Sports Illustrated
PlayStation Portal review: a portal into a niche market
Sony PlayStation Portal review: Portal to disappointment - Reviewed
PlayStation Portal review: a portal into a niche market
PlayStation Portal review: PS5 on the go