Yes, it's possible to use either the CPE 710 or CPE 610 as a multipoint access point with 4 CPE210 devices as receivers. You can set up a point-to-multipoint network configuration, where the CPE 710...

It seems like you're experiencing compatibility issues between your Denon dra800h receiver and the TP-Link Archer X23 router. Have you tried adjusting any settings on the router or the whatsapp...