A good number of our tags have pending suggested edits, which at this point just means that people have written usage guidance and wiki entries for the tags. If I'm not mistaken, only people with 750 rep (5000 for non-beta sites) can approve tag wiki edits, so those edits are piling up. And no one can make an edit to a tag that already has an edit pending, which means people who want to contribute to those tags can't do so.
How can we clear this backlog? Do we just have to wait until a sufficient number of people have 750 rep?
Unfortunately there's not much that can be done until we have more users with 750 reputation (the approve tag wiki edits privilege). It takes 2 users to approve tag wiki edits, and other than the community managers, you are the only one who can review them.
So really, all we can do is either convince the CMs to review more suggested edits or wait for more users with enough rep to review tag wiki suggested edits (which, at the current rate, should not take very long at all) and encourage them to review.
As users continue to gain reputation to perform these tasks, the pro tem moderator team will be either appointed or elected in the upcoming weeks. In the meantime, I can generally resolve issues that are blocking until you have your own moderators. Reviewing the earliest tag wikis immediately upon submission isn't generally considered something needing immediate attention, but I approved most of those waiting in the review queue nonetheless.