Archer AX73 does not replicate main router in easymesh ethernet backhaul
My main router is BE550 V1 firmware 1.0.11 Build 20240807 rel.25691(5347) and I have two Archer AX73 (version 1 and version 2) and 1 RE705X in easymesh setting.
I have one iphone 13 Pro Max which does not support 160 Mhz in the 5Ghz wifi. For Archer AX73 v2.0 firmware 1.1.0 Build 20240323 rel.70541 when connecting wireless in easymesh, the router could replicate the the main router where I set the 5 Ghz at main router BE550 for 5 Ghz network with Channel width of 20/40/80 Mhz and channel at 149.
However when I connect the Archer AX73 V2.0 above using wired LAN connection (ethernet backhaul), the router will operate at 160 Mhz channel width and channel at 40 which is different from the main router BE550 settings. So My iphone could not find the 5 Ghz network. I do not have problem with the other Archer AX73 v1.0 (this router could replicate the main router BE550 setting and operates at 80Mhz Channel width and at channel 149, which is the same with the main router via ethernet backhaul/ wired LAN). The RE705X is connected wireless in easy mesh.
I have tried many times to reset the Archer AX73 V2 and tried to downgrade the firmware (not allowed to downgrade) but all were fail. Please advice what should I do to make it work. Thanks.