SQ 723 then SQ 148 at Changi
Phuket → Singapore → Bandar Seri Begawan
Timetable, Singapore time
11:40SQ 723 from Phuket at the gate
09:00SQ 148 to Bandar Seri Begawan leaves the gate
21 h 20 apart on the timetable, overnight
SQ 148 leaves 21 h 20 after SQ 723 arrives on the timetable: more than half a day, so not a connection we count.