Seats can be made wider or reshaped. Different colours and textures. Pressure spots like coccyx soreness can have some relief. Softer foam can be fitted for more comfort.
Seat covers can be repaired or modified using the original seat cover.
This is a successful cheap option.
Seat widening can be done on many different models if required.
Some seats can be very hard and not comfortable.
Ask about replacement softer foam or if there are any other options