Share Extension not appearing in the list of apps on capable of Sharing Photo on iPhone

You have to change the deployment target of share extension form target of your project then it starts working.

Your testing iPhone version is lower than your Deployment Info setting:

You have to make sure what kind extension identifier you need com.apple.ui-services or com.apple.share-services

that's my configuration example:

This is where it appears using ui-services:

And here using the com.apple.share-services :

and then:

And for everything works fine, don't forget to make sure that your project has the same deployment info target version that your target (General/Deployment Info/Deployment Target)

see ya, hope it helps!