I would have to imagine that tracks similar to the "K" shaped economy recovery. This means that lower pay physically based positions [retail, travel, food] have seen great amounts of people leaving those industries as Government stimulus checks have given people time and money to think about their jobs, many are also leaving the industry permanently if they can.

On the flip side higher payed professional positions are seeing some turnover but no where anywhere like the other lower paid sectors.

I know for a fact that the restaurant/food service situation is on full meltdown mode in Southern California. A few panda expresses have run out rice. Multiple Habit burgers have shut down due to lack of staff, eating out at restaurants have been the worse I have ever seen it as everyone is really new and it shows.

That being said I have been to a lot of places in the country this year(Utah, Arizona, Hawaii) and nothing is similar to what I've seen locally in southern California so it may track to how expensive California has become and could be people are quitting jobs in expensive areas and moving to cheaper ones.