I've just purchased the BE25x3 to replace some older deco units, I want to use the units in router mode so that I can install a wireguard VPN directly and provide coverage across my home. I have Sky full fibre which requires me to connect the ONT to the home hub and then the home hub to the main deco. All of the units are hardwired.

I have set the units up in router mode and it drastically throttles the speed (this is before the VPN), I have checked a few things online and I don't believe that I have any of the features enabled that would do this - QOS for example. I've also logged into the Sky home hub and configured the DMZ settings, this hasn't improved the speed. I've removed all configuration now so it's back to a vanilla router mode setup.

I have Sky full fibre 500 and in access point mode I receive 400-450 speeds wirelessly, in router mode I recieve 80-120.

Help!