I’m a new game developer. I built a game for PC in Unity where players press ‘E’ to pick up items. How can I change this so that players can use a button on Android to pick up items?

I’ve searched for hours on YouTube but couldn’t find a solution to my problem. None of the videos addressed it. I’m a beginner at coding and need help. I want to make a pickup button on Android that works like the ‘E’ key on PC, but I don’t know the code. Any guidance would be appreciated.