The backrest? Its adjustable. But if it's height adjustment, i.e lower or higher for the lower seat, no.

Edit: Just had my first experience in a car with a B16A engine today. Super duper nice. About a short distance later I kept making the car die with my noob skills , had to let the owner retake the driver seat.

Mine's kicking in all the time
No idea as I have no experience. You could look around for one, maybe. Alternatively you could throw away your boat and buy a luxury car like the god car Vios, or maybe the almost Vios equivalent, the City. They won't just solve your seat issues, they'll make you look better in your mom-in-law's eyes .