@Samiulislam789 Refer this thread regarding your inquiry.

A feature request regarding this functionality has been filed more than a year ago - details. No one has up-voted this request so far.

@PNorberto You're with the latest FW release for your AX6000 v2. Is your AX6000 with the same LAN settings: IP Address: 192.168.0.1 Subnet Mask: Custom ==> 255.255.252.0 If it is, then what you could...

@Waterfox The default LAN IP address of BE800 should be 192.168.0.1. If you set the same SSIDs on its wireless radio, your devices should connect automatically. For the range extenders you should...

@Habib7042 Try using this guide for configuring the router as a wireless RE.

@Atayee You're at the latest FW release for your router model. You have to observe the support page for any new FW version which could be released.