I think 3beting PF is deffenetly worth it. You got a good hand, high cards and ds.
On the flop
I do not mind the call, but unless you get a goid turn card, fold. On the turn deffenetly fold.

Go ahead and 3 bet preflop. Double suited high pairs with an ace are very strong hands and this is the easiest way to rationalize these situations IMO:

-Are we 3 betting for value or as a bluff/to isolate a weaker player?
-Is rake a major factor in these games?
-Do we fare better in a MW pot with our combo or are we making more by attempting to get the pot HU?

-We are in fact 3 betting for value here and even though many EP opening ranges contain a heavy amount of AA combos lower stakes pools tend to have players that commonly open FAR too many combos from OOP and more importantly will continue with almost every one of those hands thinking they can always call 3 bets in PLO (another misconception).

-Rake is a big factor in lower stakes pools, so we often want to bloat pots preflop if possible to help combat that. Generally, we want to 3 bet more often and cold call less often.

-Your combo has a lot of nuttiness to it, so it does in fact play great in a MW pot, however I believe you can net more EV overall by isolating weak players in this spot and putting yourself in a position where you often will gain absolute position for the rest of the pot if your 3 bet gets through the field back to the UTG PFR. If someone cold calls, then that's not so bad because again your combo is very strong anyway. In low stakes PLO games if you flat from MP it is quite unlikely IMO to end up HU. The CO and BTN especially will almost always want to get involved with better pot odds even if they are incorrect to do so.

Post flop: It's interesting that the UTG player leads into you. If he's a thinking player at all I believe he would think he doesn't often have that much fold equity against an AA heavy range, so in these spots I often see players show up with a lot of trips. They don't often lead boats fearing folding out too much equity, but they will lead trips because they fear runouts that will put them in weird spots. They also tend to play much more straight forward in not only MW pots, but 3 bet pots as well. Not only that, but you block some of his semi bluffs with QQJ as those are the obvious wrap cards that he could fire.

I believe HU with both the backdoor FD's and the open ender we could consider peeling with about close to breakeven equity if we assign him basically a range that is heavy on 9X, rarely boats and rarely semi bluffs/protection bets, but 3 ways with the BB still left to act I think we don't have enough equity to peel the flop as the BB could still continue with a call or even x/r and future streets are going to be tough for us considering there are going to be combos he has that could have us drawing dead.

As played on the turn I think I just check back. We block some of the rare overpairs that he may have been either value bet too thinly and/or for protection along with the aforementioned straight draw combos, so it looks like from an exploitative standpoint he may be pot controlling weak trips or slow playing boats. If he has worse than our hand we actually have decent SD value and don't need to waste that by betting, so I think it's a situation where we usually don't have the FE and could have some SD value which all leads to a check back IMO.

On the river if we were playing a good opponent or against an unknown in a tough pool I would always bet here as we can very credibly rep AA with possibly not a ton of perceived bluffs in our range, but players in these types of pools way overvalue absolute hand strength, so I think I would consider just showing it down as I don't think we fold out 9X often enough.

Thanks for the feedback. Thorough and helpful.