How enable an ability of saving images on PWA?


I’ve created ionic + Cordova app for iOS and want to use it for web. But, when I serve it and long press on the images, I don’t see anything.

For example, if you hold your finger on the image on other sites you can see menu where you can save this image. But in my PWA app nothing happens when I tap on image for a long time.

What I need to add to my app for enable this option with images?

Hey guys, I really need your help!