Hi, guys. First post here. Hope it's ok to post hands without a HH, as the site I play on doesn't convert.

100 PLO 6-max. I am 100bb's deep UTG.

Kh 6h 7d Ks.
I open to $3.50
Folds all around to BB. He calls.

Pot $7.50
Flop: Jh 9h 2c. kings and k-high FD.
BB checks, I bet $6.5. BB check/raises for pot.

I've mostly been away from poker since black friday and some spots are a little fuzzy to me upon returning. I'd always thought this was a standard get it in, but others disagreed when I discussed elsewhere. Maybe I was doing it wrong the whole time? Or I was confusing this with a 3bp spot? Not sure.

Using PPT I gave villain ranges of JJ/99/J9, some wrap combos, and NFD stuff and it was about 42% or so at worst, though do I wonder if those ranges are too generous/inaccurate. And I assumed betting flop was standard as I'm trying to also get value from lower flush draws and things like OESD's.

Thoughts on how this spot should be played?

Thanks!