PLO10 non nut straight, correct fold on the turn 3w oop?

Yeah good fold as played. Not only you are behind KQxx but you often are freerolled by hands like QJJx or Q straight with a fd.
I would probably not check turn, but just bet again... There are a ton of random FDs and sets to get value from and you can safely snap fold vs raise. I would like to get an opinion for this
I also like your flop lead alot! I tend to auto-pilot check to the raisor which is probably a mistake.

I would bet the turn to protect the hand against draws.

On the flop I would go for c-raise, that way you can shove turn. Around half of the turns are blanks and around half of the times you have a problem oop.

With lead you will face a problem on the river quite often as you will have the nuts on the river only 20% of times. You turn your hand face up and can't get the stacks in on the next street. With c-raise you still turn your hand face up but can stack off half of the turns.

Of course checking has the drawback of everyone else checking. But I would much rather get to the river with disguised hand than face up hand that is 80% of times a bluff catcher.