Just a heads up...on my recent 2.5 month Europe trip all cars rented had USB-C ports only. I unfortunately lacked a USB-C to lightning plug cable for charging my iPhone 12 so I ended up buying one while there. For travel I always bring a cigarette lighter “USB + Bluetooth receiver” plug, but even that was useless as half the cars rented lacked a cigarette lighter socket.
This applied to cars rented in France, Romania, Bulgaria, Germany, and Slovakia.