I ordered November 12th and I'm still waiting, I'm really regretting selling my old Macbook in preparation because my order keeps being delayed.
I got a max 16” in UK back in December. The key is to just keep trying to do pickup and random times during the day a max version will become available to pickup. Also stores like John Lewis time to time have stock. It’s just a matter of looking regularly.Not here in the UK, when they do go in stock they say "3 weeks waiting"... then you order it and 3 weeks go by with no sign of anything.