This neat little USB-C to DP adapter with power passthrough

Oh, I can do better: https://www.amazon.com/dp/B0915ZR21Y very small adapter with power passthrough + DisplayPort + a USB 2.0 only USB C port. This google search finds more retailers and this google image search finds yet more.

it has a data port besides the DisplayPort and yet it's pretty small. Also, it's like an entire family, it has a HDMI, a mini DisplayPort, a VGA and an Ethernet version.