The flop is a call, yes.

But you should just fold preflop, I don't think you're getting odds with that hand against AA.

Even if it was double suited and you'd just about get the right odds in theory, you should still fold since calculating your equity for calling a 4bet assumes you won't make any mistakes vs AA**, and that you've correctly estimated his range to be AA**. Since you're new to PLO, you'll make some incorrect folds and calls on some flops, so it's much better to just fold the close situations pf until you know your flop equity very well.

These type of spots need to be analysed rigoursly with mathematics to dertermine whether or not preflop was bad. To go about solving these preflop spots, we can use the following model:

Villain has AAxx, and will jam every flop.

All we need to figure out is giving the stack setup, can we flop the required equity often enough to make flatting 4b better then folding pf.

Ev(fold to 4b)= 0
The ev is calculated from the moment we are 4b, not from the moment we decide to 3b

Using Propokertools, we can look at the equity distribution of AhJhThQd vs AA** on flop, to get an idea of the frequency of flopping required equity. In this particular case, we have 3bet to 12bb and villain 4bet to 41bb. It is 29bb more to call to play for a pot of 87bb on flop with a SPR of about .5 since villain only has only 42.5bb to play for on flop. This means for us to stack of post we need 25% equity share of the flop.

Looking at the HvH graph of AhJhThQd vs AA** we see that we flop greater then 25% on the top 55% of flops. Averaging this equity out by intergrating under the curve, we get an average equity of 51% vs AA** on the top 55% of flops. Pluggin all this into the EV calculation yields:

Ev(flat 4b) = .45(-29bb)+.55[ .51(+100.5bb)-.49(71.5bb) ]

=~ -4bb

So Ev(fold to 4b) = 0 > -4bb = Ev(flat 4b)