If I couldn't fit inside the seat, I would ask if I could ride in a non-seated area, such as inside the trunk if it was a sports car, sedan, or SUV, or in the flatbed if it was a pickup truck.
That's because you're not some whining, self entitled, obese female lib whale looking to make a killing off of some lawsuit, X. It should be thrown out of court.
1. The lawyer should be sanctioned for being stupid.
2. She should have to pay Lyft damages for filing the suit in the first place.