CO seems to be a taggish regular. Almost no reads on BB unfortunately. He's 30/18 after 84 Hands. All other stats are just random numbers so I don't post anything besides that.

Does he bluff often enough or v-bet worse? How about GTO in this spot? Do I have to call?

Stacks:
UTG ($218.38) 109bb
UTG+1 ($776.96) 388bb
CO ($267.61) 134bb
Hero (BTN) ($614.91) 307bb
SB ($252.73) 126bb
BB ($200.60) 100bb

Pre-Flop: ($3, 6 players) Hero is BTN 2 2
2 folds, CO raises to $4, Hero calls $4, 1 fold, BB calls $2

Flop: 2 K 10 ($13, 3 players)
BB bets $8, CO calls $8, Hero calls $8

Turn: 5 ($37, 3 players)
BB bets $30, CO calls $30, Hero calls $30

River: 8 ($127, 3 players)
BB bets $74, CO folds, Hero?

What does your turn calling range look like here?

I think BB's range is KXs,ATo+,34s+ and small pair as well.

But BB bet at the flop/turn but got called by hero, I think BB's range narrow to KXs,Hi flush draw and small cards flush already, you will only lose to small flush on the river,so I will call on the river usually.

probably 22, KxQc, AcQx, most A-high flushes like A3cc - AJcc, KTs

If he has donked b4 i put him ai. Otherwise meh call it.

Ofc call.
If it it was CO betting, it'd be much more difficult, but still a cal, I guess.

Seems a bit tight to not have non-nut flushes in your turn calling range. I assume you're not flatting suited connectors or suited gappers, which I don't think is optimal or you just typoed.

Anyways river should be a call. He can have worse two pairs and bluffs with the Ac.

yeah seems criminal to not flat a lot wider than that preflop for a few reasons.

as played I don't think I can find a fold but definitely not happy about my hand, because of how nutted peoples' ranges usually are when leading mutliway and 3 barreling at nl 200. I think it's very likely he has all KT combos preflop given the odds he's getting on his preflop call. he obviously has many flushes too but I think him potentially being a weaker player and him potentially playing KT (9 combos alone) or (less likely ofc) K5 like this combined with some Ac bluffs make this a slightly profitable call, I think.

Maybe he is more likely to raise those otf?

Not ever folding vs rando.

ah tru dat

Calling seems correct vs unknown.

not that big of a fan of flatting the flop.