The technology for lower limb prosthetics would blow you away. The simplest AKA prostheses have a simple hinged knee, which the user learns to lock and unlock in order to walk and stand, or use hydraulics to allow propulsion. The more sophisticated types have a
microprocessor in the knee "joint" which senses walking speed, gait characteristics, and can adjust for uneven terrain. People with AKAs can ride bicycles, run, lift weights, and basically do all of the activities that people with meat legs can. Here's a short video showing a guy
walking on two legs with microprocessor knees. He lost his arm, to boot, which would have complicated his rehab even more, but without seeing his legs, most observers would probably never know he was a bilateral AKA. I think that the War on Terror actually did a ton of good for amputees, because suddenly, there was this influx of super active, fit dudebros in their 20s who didn't think driving over an IED in buttfuck Afghanistan should necessarily mean an end to doing what super active, fit dudebros in their 20s have been doing for time immemorial.
Some people with bilateral AKAs, especially those who are new amputees, use "
short legs" which are exactly what they sound like - legs with no knee, just a foot. These are simpler and lighter, and their truncated length means that the inevitable falls are shorter and less scary. Obviously, you can't ride a bike or run very fast with them, but you can get around.
For any of these options to be viable, though, ithe patient has to work their ass off (and allow the stumps to heal). Kelly is way too invested in her narrative and way too mentally ill for this to ever happen. She might get some legs and take a few photos for Instagram asspats, but then she'll develop some kind of complication with the skin on her stumps and the prosthetic legs will never be seen again.