im curious when you cancel your backup flight. do you simply use the app to cancel all redundant flights as you board your primary flight?

also, have you experienced a situation where your current flight is delayed/canceled and AA is showing you no good alt options, so you cancel ur current booking (partial or full itinerary) and simply book a last minute flight same day/airport/terminal? often times during IRROP, the AA app would show me flight options to change, but i dont see the same flights that i can still book via app/online as a choice. but booking these last min flights will be a huge cost unless i can stabilize these expenses and also consider how much i will get refunded if i were to cancel the partial itinerary.