I think RC this week, public release next week 23.03. after the Apple event. Because AirTags is only usable with 14.5.
Most likely if their is a event people won’t be hands on with the products day of the event. I would say much like the past it would be end of week or the first part of the following week. So RC or public release is certainly possible, but it doesn’t feel like it would be product dependent. So I would say RC or public early next week around the event.