I made this USB to USB-C cover for wife.

V1: The adaptor that we bought (link below) did not have something to attach it to a key chain, this tight fit worked great.

V2: The USB-C portion of the adaptor was too short to reach her Ipad (since it had a case). Therefore i cut the originals case with a dremel tool (carefully), put some hot glue to cover the electronics, and then slipped on this protective case that attaches to her key chain.

V3: Just made the handle thicker so that the key chain portion would not break.

https://www.amazon.com/gp/product/B07XYTHCXV/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1

Print instructions

All can be printed without supports.
I printed in transparent PETG from Overture.