I m looking for some advice on leashes and wheelchairs I usually use my walker...
My boy isn't a service dog, but I sometimes use a caribiner to attach the lead to one of the restraint-anchor points on my powerchair. I also have a 'pocket' I'm making for the sideguard of my chair that I can strap my extendable lead in to, while still being able to reach the 'stop' button. I also want to be able to strap a torch on there and a bag dispenser. There are a couple of folks on Etsy making service dog/ dog with disabled owner kit. You could also use one of the jogging leads that go round waist/shoulder.
They do make attachments for bikes (you could adapt them to wheelchairs, and I'm sure they make them FOR wheelchairs) that keep the leash up and away from the wheels.
They make wheelchair leashes or wrist leashes. I personally work my dog off lead if I'm in my chair though because its easier and 90% of her tasks the leash interferes with. But she went through extensive off lead training.
This is my wrist leash set up