Where is OnTriggerEnter in the Execution Order?

Is it called at a specific time, or is it simply called when an object moves in FixedUpdate and a collision happens?
If it is the latter, does it interrupt FixedUpdate and call it, or is it called after the function?

It is called after FixedUpdate and the internal physics update. So all the objects move then it calls the Triggers and Collision if they have occurred.

Dont know if this helps you in any way, but i’m going to post this here:

1