Just adding my support to this.
I manage multiple accounts most of these were created under personal accounts previously, so I would have to request access from the account holder every single time I want to post. This is why I tried to move all of my platforms into HubSpot. But now I find I can’t carousel post, and it makes alot of my campaigns useless.
Looks like this has been up for almost 2 full years. This should be a very easy fix.