My old ac3150 V2 works perfect with ipv6. This new expensive ax6000 router I replaced it with is blocking ipv6 icmp requests. I've enabled WAN pings, but it's still blocking. How do I get this fixed?

Is the C3150 V2 router capable of 160mhz channel width, and if so, how do I get it to use it? I only see 20/40/80 for 5G. I'm trying to get 1.73 gb/s out of my Intel 9560 WiFi card and it requires 160