Chronic illness and disability bring recurring grief: for capabilities, plans, independence, and the version of the future you assumed.
It re-arrives at every new limitation, which is why it can feel like you're going backwards. You're not — it's a new loss each time.
Acceptance in this context doesn't mean being glad. It means stopping the war with what's real so your energy goes elsewhere.
Grieve the loss and adapt the life. Both, at the same time, indefinitely.