I have them as well on my 2019 P300. I also placed little deflectors on the side view mirrors. They have all been on my car for just over a year now and are holding on just fine. Due to how Jag makes its doors you cannot install the 'clip on' or 'clip in' variety as seen on many other cars. You can only apply the 'stick on'. I don't like that, but it is what it is, and the glue is working well. I do like the look for sure.
Here is where I purchased them from:
Buy CT Wind Visor Deflectors Set of 4-Piece - Car Ventvisor Door Side -Window Air Guard Deflectors for Protection Against Snow Sun and Rain Compatible with Jaquar E-pace 2017- Dark Smoke: Side Window Wind Deflectors & Visors - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
View attachment 176