Visiting Disney World with a wheelchair

So I have been to Disney World plenty of times, but my mom will be coming with us this next time and I had a few questions. She will be in an electric scooter as she can’t walk long distances due to a heart condition. We will likely be going to a lot of the stage shows and I was wondering if those are something we will need to get fast passes for or if they have reserved handicap seating. Any advice would be appreciated. Thank you!