Android Mouse Event Issues

I recently wrote a small game on the Android platform, where the main gameplay is to click and drag items. It only includes the touch event of the click and the left mouse button event. After packaging, there is no problem with using the mouse to control on the computer or touch screen on the phone. However, when I use the mouse button to connect to the phone for control, there is no response at all. May I ask why


This is my blueprint link

Does anyone know how to solve it?