It’s been several years since I tried ntop on pfSense but I do remember seeing in & out bandwidth for each interface. I no longer see that with pfSense 21.02.2 and ntopng 0.8.13_10. This is with both HA XG-7100 firewalls.
All my interfaces show a total bandwidth, nothing is shown with an in / out.
Is anyone else experiencing the same? My Google friend is not yielding any particular results so I came here.