Literally any other handheld will do. Even the more expensive ones.
The PlayStation Portal works fine under extremely specific circumstances
Sony PlayStation Portal is a $200 remote play device coming later this year - news
PlayStation Portal Review - IGN
Sony PlayStation Portal Remote 2024: Price, Specs, Review
PlayStation Portal review: a portal into a niche market
Review: PlayStation Portal is a slick solution for portable players
PlayStation Portal review: weird but comfortable PS5 remote play - Video Games on Sports Illustrated
PlayStation Portal Review
Sony PlayStation Portal Review: A Handheld PS5 Companion
PlayStation Portal Review
PlayStation Portal Review
Sony Says PS Portal Wasn't Designed to Make a Profit
Can You Connect More Than One PlayStation Portal? - Silent PC Review
PlayStation Portal review: fine device for a bizarrely narrow audience - Polygon, playstation portal
PlayStation Portal Review: Successful handheld or absolute failure?