Yup! My roommate is a right leg below knee amputee (I’m a left BK). He has a “left foot accelerator” installed in his SUV. You can get one on Amazon for like $150.
There’s a bracket that bolts straight into the floor with self tapping screws, so it’s fairly secure. The pedal assembly itself sits on the bracket and a thumb screw holds it in place.
The pedal assembly itself is a pedal that sits to the left of the brake pedal. That pedal is hinged at the bottom. Attached to the same hinge, on the right side of the pedal, is a hammer (sort of like what you’d see on a foot bass drum on a drum set). In front of the hammer is a flat metal plate blocking off the accelerator pedal, so your right foot has somewhere to rest without hitting the pedal.
When you push the left pedal, it rotates down. The hinge pushes the hammer onto the actual gas pedal, behind the blocker plate. Undo the thumb screw and pull out the assembly, and anyone else can easily drive the vehicle (the bracket is super low profile and doesn’t get in the way).
Edit: this is the exact one he had in his Dodge Ram before he sold it and got an SUV. He got a new one for the SUV that’s a different brand but basically identical. With this one, there’s a retaining pin that just pulls straight out to unlock it from the bracket.