How do I see the bandwidth being used by each device on the network

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This question should have been asked. What is it you want to accomplish? There are usually tools that are right for the job.

We are trying to be able to see who the bandwidth hogs are on our ISP. My understanding is that any software monitoring tool can only see bandwidth being used by the device it is installed on. Since we have dozens of devices... some of which do not have an OS that allows install of monitoring software, I'd been told we would need to get a hardware tool that monitors all traffic. Thus my purchase of SharkTap.

Strange, I could have sworn someone told be that wireshark could do this. Are we saying that there is not a single hardware device on the market that can be added to an existing functioning network, to see the bandwidth being used by every device on the system? I would think this is a relatively simple thing.... it would just pass through all the traffic while measuring the bandwidth used by each device. Anyone know of any hardware that can do this?

a 1GB Comcast line

(I was working with a 10Mbit WISP connection - YMMV)
The Ubiquiti EdgeRouter X has a screen with current traffic usage for each device being routed through it. It might tip over with your high-speed connection.

If you can get your hands on a Raspberry Pi, maybe this would be a better solution:
Monitoring Network Traffic Using Ntop on Raspberry Pi

https://www.ntop.org/products/traffic...

ntopng is a network traffic probe that provides 360° Network visibility, with its ability to gather traffic information from traffic mirrors, ...