There are some usb-c dust protectors on printables but they were too bulky or too shaky for me. That's why I designed my own protection for my smartphone with a Pitaka protective cover.
if you need any adoption or change let me know :-)
best printed in PETG - 0.10 mm and first layer 0.15 mm
or in tpu ≥ 0.15 mm
no support needed
There is an update for easier removal and slimer design:
https://www.printables.com/de/model/832470-update-usb-c-dust-cover-for-android-smartphones-ea
The author marked this model as their own original creation.