Tirphy 2 Pack Backseat Car Organizer with Tray, 11 Pocket Car Storage with Tablet Holder & Detachable Top for Steering Wheel, Road Trip Essentials Travel, Protector Kick Mats for Kids

Adjustable height table https://www.amazon.com/Laptop-Passenger-Adjustable-Eating-Universal/dp/B0G1SSZZFF Or you can get a backseat organizer that has a small canvas drop down table. It won't be very big or secure but you get a lot of leg room and maneuverability back https://www.amazon.com/dp/B0FBR3PMQM