Pocketable device capable of PS2/GameCube and light Steam emulation?

Hi everyone! I've been thinking of getting a handheld emulator for a while now. I was initially very hyped for the retroid pocket 6 as it meets most of my requirements (ps2/gc and some limited steam emulation) but its just too big. I was wondering if a similar device exists on a smaller scale?

Size wise I consider the psvita to be the very limit, its just about pocketable enough in a normal pair of trousers or a jacket pocket. I essentially want to be able to quickly grab it on public transit and put it away without fussing about with any cases, backpacks etc.

The odin 2 mini would be perfect, but the chipset would not be able to emulate lighter 3d steam titles would it? do you have any recommendations for a pocketable handheld like that?