I haven't noticed a major increase in used motorcycles, but your mileage may vary based on region. I'm in Socal. I don't think motorcycles are as complicated or chip based to manufacture and motorcycles are mostly a luxury item in the US. You'll be fine!

Both used and new motorcycle markets are incredibly tight, at least in California where I have been looking. I went to the Honda/Yamaha dealer in Berkeley and quite seriously there were no bikes on the floor. Literally none. It looks from their website that they have a handful now, but none of the stuff they would normally try to have in inventory, like the Honda NC750, XR650L, CRF300L or other dual sports, so sports or supersports bikes, no Gold Wings.