In reply to Harry_Cornish:
There's Paradox Sports in the US, who have a manual on adaptive climbing which might be useful:
https://www.paradoxsports.org/
But Hugh Herr would be the person to check out first of all, since he's a lower-limb amputee climber who started by designing his own prosthetic legs specifically for climbing and is now one of the world's greatest in the prosthetics field (running a lab at MIT).
He did some of his hardest routes after losing his legs, and says he knew he was back in the game when his fellow climbers starting accusing him of getting an unfair advantage from being able to modify his climbing legs as needed.
As well as his TED talk, there's this piece with footage of him climbing and of his lab:
Ronnie Dickson is an uber-strong climber with one prosthetic leg who Google tells me has also become a prosthetist: https://poacfl.com/tag/ronnie-dickson/
Internationally, "male lower limb amputee" is one of the toughest categories in comp paraclimbing because there's such a depth of field, with brutally strong people like Dickson and Urko Carmona in it -- I got to watch those two battling it out in a comp and it was spectacular.