I HIGHLY SUGGEST checking in as EARLY AS POSSIBLE to ensure TSA can and will appropriately accommodate your daughter. I would also recommend calling the airline her flight is with and ENSURE THEY ARE ALSO AWARE. Your concern is valid, communicate as much as possible. I hope this helps and may your daughter have a blessed and safe flight.
Yes, they have chair assistance people that will take her from gate to gate. Notify airline of need when checking in.
Thanks! Your answer is awaiting moderation.