Question about i-tec USB-C to

Should work. We have several such adapters in use, connected to beamers/monitors, and there are no problems. MacBook Pros (2019 models) are also in use. There are several sources of error: a) the adapter is defective, b) the HDMI cable is not suitable/defective,/too long, c) Mac does not recognise external monitor (for this: Switch on the monitor, connect the HDMI cable, connect the adapter to the HDMI cable and only then to the Mac) d) USB-C port on the Mac is defective or there is dirt in the port (under Apple > About this Mac > System report > USB > something is detected, possibly connect something else).