At my local LA recycling centre there is a container for the depositing of what is labelled as medical aids. I’ve looked in on the passing and crutches, sticks and wheelchairs were within. No idea what actually happens to them but at least there is option for reuse somehow and not just dumped into landfill.
I remember a few years ago, I was trying to return various medical aids after my partner died, and despite some of the stuff was unused I was told it was all single use. They did accept it when I took it back though.