Choosing which Facebook Page you post to
If you granted more than one Page, a Posting to / Change line lets you switch which one EverySqueeze acts as.
If you granted access to more than one Facebook Page when connecting, Settings → Accounts and platforms → Facebook shows a line under the Facebook card: "Posting to" your Page's name, with a Change link.
Change opens a list of every Page you granted, each showing whether it can post and whether it has Instagram linked. The Page currently in use is tagged Current; the one EverySqueeze would pick on its own — the Page that can both post and reach Instagram — is tagged Recommended.
Picking a different Page switches which one EverySqueeze posts to and reads Instagram through. This only matters when you granted more than one Page — with a single Page, there's nothing to choose and this line doesn't appear.
After reconnecting Facebook with several Pages granted and none already chosen, this picker can open on its own once, pre-selected on the Page already in use; closing it without changing anything keeps that Page.
See Connect Facebook and Instagram for selecting Pages at connect time, and Reconnect a platform if a previously used Page stops posting.