Connect Facebook and Instagram
One Meta login covers both — pick every Page you post to, including ones your other EverySqueeze accounts use.
Facebook and Instagram connect through one Meta login: connecting either one connects both. Before Facebook's Page picker opens, expect three screens.
On "Continue as <your name>?", click Edit settings — not Continue. Continue skips the Page picker and can grant the wrong Page.
Settings → Accounts & platforms → Facebook keeps these steps behind the ? beside Facebook, titled How Facebook posting works (a link of that name in the older layout). Next, on the Page-access screen, choose Opt in to current Pages only (not Opt in to all current and future Pages, which can return no Pages at all) and select the Page for this brand and your Instagram. Do the same on the Instagram accounts screen that follows.
Select every Page you already post to with EverySqueeze, not just this brand's Page — a Page you leave out stops posting, and this can affect other EverySqueeze accounts that use the same Page. Facebook keeps one Page choice for your whole Facebook login, not one per EverySqueeze account.
When your other EverySqueeze accounts use the same Facebook login, EverySqueeze lists their Pages before Facebook opens: "When Facebook asks which Pages to allow, select ALL of these". Select your own Page and every Page in that list, then choose "Continue to Facebook". If one is still left out, the screen you return to names it — see Facebook Page access removed.
Once connected, Settings → Accounts & platforms → Facebook shows the connected Page. "Facebook and Instagram share one connection. Their auto-post choices are separate." — each still has its own auto-post switch and daily limit.
For Instagram to post automatically, the account linked to that Page must be a Professional (Creator or Business) account — see Instagram connect choice and Instagram must be a professional account.
If a connection stops working, Settings shows Reconnect instead of Connect — see Reconnect a platform.