there was a sign as of late March. I don’t remember exactly what it said but somewhere along the lines of the lounge is closed please use EVA. Based on your link, seems they are directing SQ biz and elite members to plaza premium.

plus by now if it hasn’t opened, not sure if it will. Never really understood why it was open considering precovid it was only two afternoon flights to Singapore. Not sure if it is back to two daily flights.