DR7 and AppleTV 4K Speed slow?

Just upgraded from a ASUS WiFi 6 router. I upgraded to 1 gig speed internet. All of my devices get close to that but, my AppleTV can’t even crack 500 Mbps. Preciously had 600 Mbps. It’s not a distance issue because I was getting over 600 Mbps with my old router? What settings can I play around with to get better speed?