Hello, i am using ent_faceto to turn to target smothly but i have to use wait_for to determine if entity reached the angle. And using it stops all other functions in while loop till it reaches the angle.

That's not a question you'd ask the developers. Be patient until someone answers your (old) question.
Btw I've already told you how to avoid freezing your while loop by waiting for things to finish.

Did you tried to call this, out of the main?

I am sorry if so but using new entmove.c you have to manually check if the entity reached the angle by using wait_for which freezes the whole thing till it reaches the angle and i thought it is worth to mention to developers so they can come up with a work around with it?

But Superku that technique doesn't work with it or maybe i couldn't get it. Can you please give me an example to use ent_faceto with wait_for inside a loop without freezing other functions inside that loop? Thank YOu

Waiting is just the purpose of wait_for. If this is not desired, just use a different function to check if the end position is reached - for instance by comparing the entity angle with the target angle.

All entmove functions set a definite value when the target is reached, so it's easy to check from another function.