My doubt is simple:
I have 4 USB-C ports on my MacBook 13" 2017 Pro. I use all the 4 at the same time (3 for pen drives and one with the adapter to share my screen to a HDMI equipment). Can I use the USB-C entrance of this adapter to charge the computer while sharing the screen using the adapter at the same time?
MacBook Air (2018 or later)
Charging your Mac
USB-C 
Use the USB-C port of this adapter for charging your Mac, not for data transfer or video. For example, you can connect one end of the Apple Thunderbolt 3 (USB-C) Cable or Apple USB-C Charge Cable to the USB-C port of this adapter, and connect the other end to an Apple USB-C Power Adapter.
This port delivers a maximum of 60W power, suitable for MacBook models and 13-inch MacBook Pro models. For the best charging performance on 15-inch MacBook Pro models, connect the power supply directly to your Mac, not through the adapter.
from:
About the Apple USB-C Digital AV Multiport Adapter - Apple Support
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USB-C Digital AV Multiport Adapter - Charging and using HDMI at the same time
