I think it, that a plus store could be partner plus but Shopify has separate it because developer and merchants are two different roles, The first require special features for selling and another require special features for developing.

I'm working with a private app and I need permissions for read_publications, because I know the id the sales channel of my Store. Shopify support tell me that I need a private plus app for getting this permissions. How can I convert my private app in...