Yooper In Training
The brake/parking brake is still on the left on mine, and I believe nearly all compact/subcompact tractors, but with the hydrostatic trans I pretty rarely actually use it. Really only if I'm parking on a slope or doing precision loader work. It'd still be a concern though depending what you're able to do with a prosthetic(assuming you use a prosthetic).Left leg.
Hence keeping the two garden tractors I have. One has a parking brake on the left side, the othe has no left pedal and a right foot clutch.
Ironic that I used to joke that “automatic transmissions were for people without left feet”.