Is there a way to check the amount of checked baggage you have attached to your ticket online?

Reason I asked is that I changed the time of one segment on my ticket and upgraded it to F to give myself more time and flexibility to make an unprotected connection at SFO (and giving me two bags).

However, despite the website stating the checked bag entitlements would be preserved if a ticket changed, the checked bag of a MIA-LAX segment dropped off (I'd previously booked the ticket with Main Plus, which comes with one checked bag for us plebs without status or an AA credit card). I've rung AA's customer service who's assured me they've reinstated the checked bag on the MIA-LAX segment, but I'd like to confirm for myself...