If you goto the main page of the comic you want to add instead of an individual issue you can add them all to your favorites list. I got lucky after adding one issue of Hitman, I noticed the main page still had a + sign on it and no check mark in my list.
When I add a entire run I don’t see it on my tablet.
Is this only an option on web browser maybe? When i go to the main page on the android app i dont have a “+” anywhere.
Yeah I only see it in the browser