Have you try on Android or iOS?
As long as I remember, the social sharing plugin isn’t able on Android to tell you if it’s a success or not. On iOS everyting is fine.
I spend hours to find a solution and I’ve to say, I didn’t find any except a workaround.
On iOS I use the social sharing plugin.
On Android, I use the cordova-plugin-facebook4 dialog because at least this plugin tells you if the user used the acttion cancel or not
Also to be noted, Facebook API doesn’t give back tanymore the post id of the publication to the caller respectively you can’t be 100% sure that a user shared or not something, more to see like a guess, at least I understood it like this.
Hope that help