Welcome @dig2dye2 - I'm not a doctor and have no medical training but I'm pretty sure the answer to can trauma cause neuropathy that you are experiencing is a big yes. Here's an article on the topic that is fairly recent:
-- Diagnosis and treatment of the most common neuropathies following knee injuries and reconstructive surgery – A narrative review: https://www.sciencedirect.com/science/article/pii/S2405844021021356.

Since you mentioned that the rest of your body besides the right knee went into the concrete might explain nerve compression or damage causing bilateral neuropathy symptoms. Have you thought about seeking a second opinion or help from a teaching hospital or major health facility?