How do I detect collision from single attached collider only.

I’m trying to do a platformer character controller, I have square collider and circular one below it. Circular one is meant to detect when player is standing on ground.

How can I detect events from only circular collider, not all attached to the game object?

add Rigidbody2D to your circle Collider and also enable Is Kinematic.
I don’t know how you wrote your Scripts, but you need to create a different script for your ground.

You may try like:

GetComponent<CircleCollider2D>() == Physics2D.OverlapPoint(yourCameraConvertedPoint);

I assume this line is written in a script which is attached to the gameObject having 2 colliders.