Can u get a torch under from the back and see the railings from the back and whats jamming it

Yeah nah I can’t see anything that would be stopping it, give it a better look with a better torch not my phone lol

So u can pull the lever up and it looks attached

Yeah it still told back and forth when I use the lever just doesn’t go past a certain point, something is definitely jamming the right hand rail

Check if there is something as simple as a dropped coin stuck in the rails. Doesn't take much for power seats to jam.

Tried sitting on it with all your weight and wriggle the fuck out of it with the lever up and go bazzurk on it till it pops