Ok, I upgraded to openwrt 21 vanilla firmware for this router. I was able to successfully setup mesh-point now. However now there is another issue. The mesh runs fine if I don’t use any encryption on mesh-point connection, however If i set WPA3-SAE encryption (i.e. only one supported by 802.11s), it still shows encryption as none as is not able to connect with master node.
If anyone has setup mesh using gl-ar300m, can anybody tell if it works for you?