PLO50 AJT2ds 3way 3bet pot, postflop line?

Preflop squeeze is totally fine. There are also weaker hands squeezing in like A♠:9♣:8♠:5♣: or A♠:T♣:9♠:2♣:.

Flop we are checking 100% 3way as the mid-high straight texture is the worst possible for our range. (Straight textures in general are high freq. checks oop in 3bp).

Ott we lead high freq. if it went check-check-(check), the A♥: favours our range so the bet is good. I assume this is a situation, where it is okay in general to be merged as our leading frequency is supposed to be so high.

I would have bet half-pot too but solver seems to be betting pot with those weaker SDV´s (potting top-pair+gs/..). We can more or less discount straights from both opponents ranges (SB checks twice and BU checked flop ip), which shifts the polarity advantage to us and this demands a higher frequency of bigger sized bets.

I don´t fully understand why you are turning your hand into a bluff otr, we have top-pair which is nice SDV. You are surely not going to fold out another :Ax:-2pair (:Ax: and with blocker) or set and the busted draws/bluffs(+pair) we have beat anyways. Maybe you can get a weaker flop-2pair (mid- and bottom 2pair) to fold where the question is how many of those villain would hold in his range after checking the flop and turn but suppose those to fold makes sense. He also might have improved his defending range by rivering an or which he can have easily after calling the turn. I am not sure how far villain goes folding weaker 2pairs (like without the ) but overall I think there are too many 2pair and set combos that he´d call plus non-SDV we´d win compared to the portion of 2pairs and better top-pairs (it´s just ) that´d fold. No regards to our FE, imo the river shove is very inefficient as we prefer bluffings hands without SDV.