Do u guys know, international firmware got additional setting for VLAN, which u can set and dial (Without need to go to SSH/Telnet)

First update your firmware to 3.0.22 https://bit.ly/MiAX3600INT

and then factory reset and after reboot enter 192.168.31.1

Then you notice as below, click at additional setting, put your vlan

[attachmentid=10744283]

singapore users from HardwareZone SG said international firmware's wifi coverage will be smaller compare to Chinese firmware.
But international firmware had include the vlan function. so no need vlan switch for unifi or maxis.

I managed to do ssh persistent currently using ax3200 with unifi. Did a manual vlan config

first u need to revert the firmware to 1.0.17. turn on the ssh access

2. change the region to CN
3. after that you can do a nvram commit to ensure that the change Is committed on the firmware.
4. need to write a long guide. i will revert to you when i have time.