Hi Solidz75,
I had the (I think) the same squeaking in my 2018 X 7 seater...
In my case the seat material was touching the Falcon Wing Door...
I have attached a picture of the contact area...
View attachment 518245
Many things were tried...
Krytox lubricant... Teflon tape... Adhesive felt pad...
The felt pad is in place now and the door is quiet.
Shawn