Click the green flag. Notice how two clones (the red balls) disappear as they collide. Just a demonstration that it is possible to detect collisions between clones of the same sprite.
This project detects collisions with ANY other clone of the same sprite. Other projects can help you detect collisions with a SPECIFIC clone: https://scratch.mit.edu/projects/664601726/ https://scratch.mit.edu/projects/665020766/ The 'touches' block was created by dragging it over from another sprite, as explained here: https://stackoverflow.com/questions/72572235/in-scratch-how-can-the-clone-a-of-sprite2-detect-if-its-touching-another-clone