I changed to different SSID names on my Gateway and now my Fire Stick 4k Max can see the 5ghz network. I am getting 200mbps on the 5ghz network on the extender. I forgot to mention the gateway is on...

I have a 300mbps fiber connection and I am only getting 94mbps on my Firestick 4k Max. My Firestick 4k Max can only connect to 2.4ghz. I also have a WIFI 6 AT&T Gateway. Thanks.