From where to add app icon?

Hey! I’m new to Appgyver. My query is how can I give my app an icon as I’ve built my app but not sure where to add icon from. Thankyou

if you need icon for the web browser, you add this when you go to finalize and distribute your app in launch tab,
As for smartphone apps from what i know you have to give an app icon when you go to set up distribution in playstore or in appstore