Production stopped at most manufacturing (Powell actually had to move out of the building they've been in for decades), so it's a bit of a delayed effect since distributors were normally stocked until they couldn't get product anymore. Production has started back up in some places, but at a reduced rate. BBS, for example, was operating at 25% last I heard. It's taking a long time for deck brands to get their orders from them.
I work at a shop and we're busier than ever but unfortunately have limited stock to offer. So many new skaters (many female) setting up their first complete, and trucks have been the hardest thing to get so they're ending up with neon orange Silver trucks and shit.
Yes, almost all distributors are out of decks right now, it's wild. They go right out the door again as soon as they come in so nothing is even making it to the shelf to sit. It's been great for selling off sale decks or anything that wasn't moving previously. If there's not another big shutdown, I'd say things are already slowly on the way back to normal for product availability, but it's gonna take a while. Might be slim pickings until next year sometime.