Hi @Salvatore_Oliva
I checked the file and found that you have only implemented blocks to get shared file/text.
To be able to show your app in Share to list you will have to add specific mime types in manifest with the help of @UsesActivities.
Here is an example of it:
Also check this if you don't want users to compile the extension everytime:
https://deep-link.000webhostapp.com/