Hello @KTA-Tator ,
I'm not finding any official documentation on our side about it, but from what I gather it seems like there may be an administrative setting for company pages to allow 3rd party apps to connect? I'd suggest getting yourself moved to a super admin position for the page, or have someone who's already an SA login through the Constant Contact account to see if the company page shows as an option then. If not, make sure there's no settings for the company page that'd be blocking 3rd party access in some way.
If the pages you're trying to connect still aren't available even after an SA login, please let us know so we can setup a case with our higher level technical team to look in further. If you're able to confirm the pages showed when logging in as an SA, I'll make sure to leave feedback for our existing articles to highlight this aspect.
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