Spigen's products are famous, so you'll want to buy the Spigen Rugged Armor Pro for Steam Deck. Then this case still has enough room for the Lenovo Legion Go, and it has a good carrying handle ...

it comes with a free case. To quickly summarize the Legion Tab, Lenovo’s new gaming tablet packs a Snapdragon 8 Gen 3 and 12GB of RAM into a compact Android tablet with an 8.8-inch display.