For example, LSGK is given an “SGK” IATA code on the Dashboard page (which is not present on the Flight History page).
I imagine Simbrief may be assigning a fake IATA code internally to airports that don’t have any to be used e.g. on briefing formats that use such codes like the default LIDO layout?
SGK is actually a valid IATA code for Sangapi Airport (AYSK).
Regards,
Tim