Unity Script Reference:

static function OverlapPointAll(point: Vector2, layerMask: int = DefaultRaycastLayers, minDepth: float = -Mathf.Infinity, maxDepth: float = Mathf.Infinity): Collider2D[];

static Collider2D[] OverlapPointAll(Vector2 point, int layerMask = DefaultRaycastLayers, float minDepth = -Mathf.Infinity, float maxDepth = Mathf.Infinity);

static def OverlapPointAll(point as Vector2, layerMask as int = DefaultRaycastLayers, minDepth as float = -Mathf.Infinity, maxDepth as float = Mathf.Infinity) as Collider2D[]

Parameters

minDepth	Only include objects with a Z coordinate (depth) greater than this value.
maxDepth	Only include objects with a Z coordinate (depth) less than this value.
point	A point in space.
layerMask	Filter to check objects only on specific layers.

Description

Get a list of all colliders that overlap a point in space.

This function is similar to OverlapPoint except that all colliders that overlap the point are returned. The colliders in the returned array are sorted in order of increasing Z coordinate. An empty array is returned if there are no colliders over the point.

Note that this function will allocate memory for the returned Collider2D array. You can use OverlapPointNonAlloc to avoid this overhead if you need to make the check frequently.