You can let the battery cool down, but the Mavic is ready to go after a flight. It has in internal cooling fan that keeps components at their normal temps during the flight, no need to cool down after.
Flying at 106° is considered "extreme" in DJI's books, so be mindful of your battery temperature. Also, I hope you are using some type of shade for your device, they are very susceptible to overheating in extreme weather.
If I had to fly in 106°, I would bring my temp gauge and make sure none of the motors are getting any hotter than 120 - 130°.