Well I'm convinced:
STN/BKK 3 pw
STN/CUN 1 pw
STN/JRO 1 pw
STN/SGN 1 pw
STN/SIN 1 pw
STN/KBV 1 pw
STN/TFS 1 pw
https://atmosphereairlinesuk.com/flight-schedule
Strangely, no trace of them on the Stansted website, but I'm sure that's just a matter of time ...