In the US here. I put an order in for a P300 in June. It took about three weeks for the dealer to get back to me that the order was taken. The build will start in Dec and be delivered in late Jan.
I ordered a 2021 version. I had gotten some extras like the auto cruise control, auto lift gate. Turns out that I am getting a 2022...I dont even know what they are changing on the model. Guess I will know more in Oct (when they usually start giving info on new models).
As far as different build times. A lot depends on what you order. It could be that what you want is already in the build process but not claimed yet. The more common your choices, the sooner you might get it. So, it can vary a lot.