I've seen at least one thread that brought this up and was dismissed, but seriously, there needs to be a way to connect to an Instagram account without going through Facebook! A ) Not everyone who uses Instagram uses Facebook, and B ) some, if not most constant contact users are probably businesses or organizations that utilize pages or accounts specific to that entity and not the person managing them.
I'm a web admin for an organization, but I don't have the organization's instagram account linked to my personal Facebook page, nor do I want to. I didn't even realize my own personal Facebook account was being linked to Constant Contact to connect the pages until I was trying to link Instagram; and will be rectifying that as soon as I'm able to sit down with my client and connect CC through their Facebook. But even then, there's no reason for them to have the organization linked to their person Facebook page either.
Just make it so Instagram is connected directly and separately from any other platform. I get Meta bought Instagram, but surely the two platforms are independent enough to link to one without the other if you have a login and password for the platform and account you want to link.