Charger box

Hello, I received a new iphone 12 pro for Christmas. The box included everything except for the charging box for my phone. It came with the cord, but it does not fit in my current box. When my children upgraded their phones to the 11, a box was included in the packaging. How do I go about getting one so i can charge my phone?

Also, I am having a difficult time syncing my phone to my vehicle. Any suggestions?