You do not need to run a Meta app to offer publishing in your product
Offering Facebook and Instagram publishing inside your own product normally means becoming a Meta app operator. You register a developer app, request publishing permissions, prepare a demo flow and screencast for App Review, respond to reviewer questions about features you have not shipped yet, and then keep that approval healthy as your product changes. The publishing code itself is rarely the hard part. The review cycle, the permission set, and the maintenance that follows are.
bundle.social removes that dependency. Your product calls one API, and your customers authorize their own Facebook Pages and Instagram Business accounts against an integration that is already reviewed and actively maintained. You are building a social product, not a token-refresh service, and App Review stops being a milestone on your roadmap.