If they weren't shipped before the Chinese New Year then it could be a couple weeks. Most of China manufacturing have been off for their holidays (most are off 10-14 days to travel from the factories back to their families - often massive distances) - my work has a factory there and some started to return yesterday, with it getting back up to full speed on Mon.
Assuming the global stock is now waiting on China to start dispatching goods after their holiday, we're now at the mercy of UPS and customs... Anything we get air-freighted from our factory takes approx a week to travel and clear customs - so any already assembled stock waiting to be dispatched could potentially start to arrive the tale end of next week. A more cost-effecting option is sea-freight, and you're looking more like 6 weeks...
Being a cynic, if they pushed through all assemblies and made sure they were shipped before the holidays (instead of sitting at the docks) then you might need to add in extra days-week time for the assembly lines to kick in...
But, who knows...
It's a crazy time to launch something made in China.
There's lots of conflicting information out there. The average Chinese worker gets one day off for the New Year. Of course senior/management positions get more or can afford to take more, though these are not the staff positions that are boxing cards or doing the manual labour jobs not covered by automation.
Also, the manufacturing lines are very highly automated these days, further decreasing needed labour.
This week we've seen many cards come into stock (there's an app showing stock drops) and we've seen people get cards from OCUK and other retailers, so stock has not stopped yet at least. Hopefully things continue without a complete stoppage of deliveries!