I keep an insert in my phone's USB-C port that blocks it. It would be kind of annoying to have to take it out whenever I want to connect the phone to the car and then put it back in when I leave the car.

I'm not actually sure that this is necessary with USB-C, but when I had Lightning phones I noticed that every so often they would stop charging when I plugged them in.

I determined that was from pocket lint getting into the port. Scraping the lint out with a toothpick would fix things. When I got a phone with wireless charging I switched to using that and put a cover on the Lightning port.

I kept the habit of using a port cover when I got a USB-C phone. I've not actually checked to see if pocket lint is a problem with USB-C ports.