PSA: Trip Credit May Not Be Showing in App nor Desktop.
If you have active travel credits, I would recommend checking your wallet, as both the desktop and app are missing travel credits for my account.
Even if you find them, there is no way to make them stick.
Best way to search for them is through your email under travel credit, and unfortunately, need to redeem them manually at this current time. Not sure when AA IT will catch back up to correctly reflect travel credits.