Thanks for sharing, xiaofan!
My ONT appointment with M1 is already scheduled for end of this month. I will be on their 3Gbps plan and already bought a new 2nd BE230 router to prepare to set up an EasyMesh network using Ethernet backhaul. Not expecting high end performance but since it is as you shared, at the very least better than Singtel's AX5400, that would certainly be good enough for me, ha
Currently, while on the Singtel 2Gbps plan with the AX5400 mesh setup, my cellphone and tablet devices are always between 880 and 940 Mbps, which is peak performance to me

Oddly, my new 4-month old Aftershock PC only stays within the 400 to 550 Mbps Wifi 6 range. All my devices are used within my bedroom which has the secondary AX5400 mesh node on Ethernet backhaul.
Hopefully, with the upcoming change to the BE230 mesh setup, the Wifi speed for my PC could improve some