Hahahaha, you’re not the first to wonder why it’s exposed in the first place. A bulk of the discussion for the FPC is found here. It may be a DevTerm topic, but that and the uConsole share virtually identical boards.
For assembled boards, you really only have the uPico and uHub that is available (or not since you say they’re sold out). But the complete blueprint of those boards are also on Github so you can build it yourself or have it made for you by somebody else.
The rest of the boards are in varying stages of development (or production). Search the forum for details on those.