Had a recent flight change for a booking that has made me question our itinerary.

AA DSM>PHX>LAX, now arrives 1130am in LAX. Connecting to TN LAX>PPT with a departure at 230pm, on a separate ticket. 54 minutes in PHX to make the connection, and then 3 hrs to make the AA>TN connection in LAX. Should I be concerned with either of those timelines? Was originally trying to leave a buffer for weather/etc, but after the schedule change, that PHX connection is tight and I don't know about 3 hrs at LAX, never connected there before with separate booking. Should I be concerned?

We will be checking bags, and we'll need to get from AA domestic arrival terminal to wherever TN operates from at LAX.