I just spoke to my SA (I am located in Central Florida) I placed my order for a GTS back in early March. The lock date was suppose to be 4/21 and he just told me it looks like it will lock on 4/30 with expected delivery sometimes in July. He did tell me Porsche is going into a 30% shortage of car orders. Whatever that means, I didn't ask but looks like your dealer is right with custom orders taking longer. Are you looking for the GTS model? Apparently those are the hot cars this year and the hardest to find allocations.
If you are dead set on a custom order, I would try to find someone who has an allocation or have an allocation they could swap with another dealer (that's what my dealership did, they swapped another model for my GTS)
I called & visited a lot of dealership for my GTS. It was very hard, almost impossible to find an allocation. I even had my name on a waitlist at 3 different dealership throughout the US. With all the Porsche dealerships in Florida, you should be able to find one that has an allocation. Wishing you luck!