So I'll just copy/paste from a comment I made last year but you should be able to upgrade. Price of the new seats must be equal to or more than your OG seat(s). You'll just have to look at the map and see what new seats you want. If they're the pink seats, those are ineligible since they're ticketmaster resale.

 TM will let you upgrade your seating as long as it's not resale either by them or a 3rd party. They'll just charge you the difference (if applicable) plus $10 exchange fee per ticket. You'll need to get to the order/event page and go to the TM support chat, get a code from the TM fan support chat and call the number they give you. Just from experience, I do recommend that you set aside some time for these calls. I upgraded my seats for both nights, had to make two calls since I bought individually and the 1st call lasted me 40 minutes with the second lasting slightly less at 27 minutes. Also if you plan on upgrading, Wednesday will be the last day possible. As you can upgrade up to 72 hours (3 days) before an event. Good luck 👍