Toggle in my list showing "nothing Available"

Hey guys, Please I need help. I have been trying to follow tutorials on the creation of favourites to no avail. I have a custom list which for businesses which I linked to a detail screen for the business. i added a toggle for favs hoping that i could configure it so that when the toggle is on, it would show up in my favourite list.
i have created another list intending for it to be a favourite list so that the user can go there and see all the businesses he/she had favourited. I have a many-to-many relationship between users and a database I created for favourites.
The Probem is that on the business list, the toggle shows “nothing available”. I must be doing something wrong. Can anyone help?