I just installed it and received some lightning bitcoin sent from muun wallet.

I think the aqua lightning wallet is also on the liquid network, so not sure of the mechanics going on in the background, but it seems like sending lightning from regular lightning wallet to one on liquid network is no problem. I did get hit with a $6 transaction fee on the Muun wallet side, but that was expected because of the way they do lightning transactions and was a reason for me moving my balance to a new wallet with cheaper fees. I dont think the high fee was because of liquid network, but maybe someone else has more info on that.