Hello @JamesMalmsteen,
The link below will give you an overview of the supported protocols.
OT supported protocols - Lansweeper Community
We don't use an agent on the devices themselves. But of a Hub/Sensor architecture. See image below. If you want to detect an OT device, it is important to have the sensor in the same VLAN as the OT device.
If there are more questions, we can always set up a Teams call to demonstrate the software and answer questions or if necessary, we can assist you in installing the software in your own environment.
Below is an example of a scan result