Part of the issue is just a normal production ramp of a new factory.
Part is that we were warned in advance Berlin and Austin involved some new technology, and that there may be some teething problems.
IMO part may also be that on site refining of Lithium in the new Cathode plant is part of the 4680 ramp. Previously the Lithium was going to come from Piedmont, and due to delays in getting the mine approved, Tesla had to find other sources.
I do think Elon is odiously happiest when everything is sailing along fine with no issues, we they hit speed bumps, Elon tends to react in a proactive manner. Regardless, Elon, Drew and the team will sort everything out.
Lithium from the on site Cathode plant might be Q1 2023 when that is pumping, we can then judge if there are other issues with the 4680 ramp, by that time I doubt that there will be.
But there is a likely need to use 2170s at Austin in Q3/Q4 2022, and they probably could have used them in Q2 if they had the equipment to make the packs.
It does look like a lot of new equipment is going into Austin, it is likely some of that is sorting out issues with existing lines.