Can't find any solution or product that'll add one more USB-C port to MacBook Pro13 Macbook 13 Pro. Two USB-C ports only


one used for charging 
one used to connect to a monitor
I need another one for a USB-C to ethernet adapter


Is there a USB-C hub anywhere in existence? I can't find anything on Amazon to my amazement. I need 3 USB-C ports on my MBP.
Your question will likely elicit opinion-based answers, but what you are looking for is a Thunderbolt 3 dock. These can include USB-C, USB 3.0, Thunderbolt 2 and 3 ports, gigabit ethernet, FireWire 800, SD card slots, HDMI, DisplayPort, audio jacks, and so on.

Prices range from a little over $100 to more than $400, depending on what connectors and how many are included. See this page here to get some ideas, but you are looking for a Thunderbolt 3 dock.