Uphill treadmill walking

I have found a lot of fitness benefits, not to mention mental health benefits, from Peloton cycling. Trying to cross train so I do weights, but also thought treadmill would be a good cross training move. My knees have been enjoying themselves since I stopped running, so trying indoor “hiking” and my back is not happy afterward. Is it especially hard for people with scoliosis to walk on a steep incline? I have a 35 degree lumbar curve.