If you set up an edge collider on the objects you can use

void Update()
{
    //this detects the mouse position
    Vector2 mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
    //this check to see if the mouse is over the collider documentation below
    if (this.GetComponent<EdgeCollider2D>().ClosestPoint(mousePos) == mousePos)
    {
         print("mouse is hovering over object");
         if(Input.GetKeyDown(KeyCode.Mouse0))
         {
             print("mouse clicked on object");
         }
    }
 }

documentation https://docs.unity3d.com/ScriptReference/Collider.ClosestPoint.html

If you set up an edge collider on the objects you can use:

void Update()
{
    //this detects the mouse position
    Vector2 mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
    //this check to see if the mouse is over the collider documentation below
    if (this.GetComponent<EdgeCollider2D>().ClosestPoint(mousePos) == mousePos)
    {
         print("mouse is hovering over object");
         if(Input.GetKeyDown(KeyCode.Mouse0))
         {
             print("mouse clicked on object");
         }
    }
 }

For more information, refer to the documentation for Collider.ClosestPoint.

If you set up an edge collider on the objects you can use

void Update()
{
    //this detects the mouse position
    Vector2 mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
    //this check to see if the mouse is over the collider documentation below
    if (this.GetComponent<EdgeCollider2D>().ClosestPoint(mousePos) == mousePos)
    {
         print("mouse is hovering over object");
         if
         {

} } }

documentation https://docs.unity3d.com/ScriptReference/Collider.ClosestPoint.html

If you set up an edge collider on the objects you can use

void Update()
{
    //this detects the mouse position
    Vector2 mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
    //this check to see if the mouse is over the collider documentation below
    if (this.GetComponent<EdgeCollider2D>().ClosestPoint(mousePos) == mousePos)
    {
         print("mouse is hovering over object");
         if(Input.GetKeyDown(KeyCode.Mouse0))
         {
             print("mouse clicked on object");
         }
    }
 }

documentation https://docs.unity3d.com/ScriptReference/Collider.ClosestPoint.html