Not all USB-C ports support all features of USB-C. Some computers and smartphones only support data over USB-C for external storage such as flash drives while some devices support video and charging over USB-C. Check the below article about the USB-C port capability. If you are not sure, please consult the manufacturer for this information.
Symptom: The adapter is not functioning properly on a Windows computer with Thunderbolt 3. Symptoms include no video and flickering video.
Solution: Update BIOS, Thunderbolt 3 firmware, Thunderbolt 3 driver, and Intel Graphics Driver from the manufacturer website. For more details, refer to articles below:
Symptom: No video output through this adapter
It is a known issue that certain old monitors including the 30 inch Apple Cinema Display are not compatible with this adapter. These monitors require dual-link DVI, which has 6 TMDS channels. This adapter is single-link and only has 3 TMDS channels.
Symptom: The adapter is not recognized
Unplug all cables, restart the computer, and then reconnect everything.