A simple Netbox report that checks if all the enabled interfaces are connected. Creating a new section for each site.

connected_interfaces.py

from extras.reports import Report
from dcim.models import Device
from dcim.models import Site


class ConnectedInterfaces(Report):
    description = "Check if all enabled interface are connected"

    def __init__(self, *args, **kwargs):
        for site in Site.objects.all():
            site_name = site.name
            setattr(self.__class__,
                    f'test_connected_interfaces_{site_name}',
                    staticmethod(self._connected_iterface_wrapper(site_name)))

        super().__init__(*args, **kwargs)
    
    def _connected_iterface_wrapper(self, site):
        def run_report():
            self._connected_interface(site)
        return run_report

    def _connected_interface(self, site):
        site = Site.objects.get(name=site)     
        devices = site.devices.all()
        for device in devices:
            for iface in device.interfaces.all():
                if iface.enabled is True:
                    if iface.is_connectable:
                        interface = iface.name
                        if len(iface.trace()) == 0:
                            self.log_warning(device, f"{interface} not connected")