Will be traveling by flight for 22 hours. My daughter is 9 month old and she is very active. What to carry in the fight? Also what challenges will I be possibly facing?

Will be travelling with my daughter for the 1st time in fight for straight 22 hours. She is 9 month old and does not sit in car seat for now than 10 minutes. I have no idea what challenges will I be facing. Any experiences? Also what do I carry with me in flight?