Kristin, that’s a big pain! I emphasise as I hate being OOS and I hate delays at the fulfilment centres too. But some of the FCs have backlogs at the moment and there is nothing we can do but wait.
In your case, don’t do anything to your listing. Just wait. The listing will automatically become Active once some of the units eventually get checked in.
In the meantime, you may need to think about a strategy to regain your ranking like a mini-relaunch or maybe aggressive PPC.