Setting public permission for content-type added by a plugin

I have a plugin that adds a new content-type InstagramFeed.

In localhost:1337/graphql I can see a new matching root query query.instagramFeedInstagramPosts being added, but when I run it I get Forbidden access .

If I try to look into strapi admin > Settings > Roles > Public there is no matching route for my created content-type. Where can I set the auth for this content-type?