Hi Andy,
Paul isn’t far wrong...
If traffic is showing in the PAW Traffic Screen, but not displaying on SkyDemon, it is being filtered out by one or the other set of software.
If it is being filtered by PAW, it will be visible on the receiving aircraft’s Traffic Screen but ‘greyed out’. If it’s visible but not greyed out, it will be passed to the Nav Software, which will then apply its own filters, so if not greyed out on the PAW Traffic Screen and not displayed on the Nav Display, it must be being filtered by the Nav Software Settings. You need to check both.
For Positional Targets (P3i, ADSB, uplinked FLARM and MLAT Mode-S) the Positional Target filters in PAW should be set wide open and any filtering set in the Nav System Settings. For Bearingless Mode-C or Mode-S, the relevant filters need to be set in PAW.
Screenshots of both of your PAW Traffic and Configuration Screens and your Nav System Settings should certainly clarify the situation if you want us to take a look.
Best Regards
Peter