Ring 4 Doorbell won’t ‘see’ my 5Ghz WiFi signal

Hi, So I recently purchased the Ring 4. Setup went without any hiccups until I noticed that it wouldn’t detect or ‘see’ my 5Ghz WiFi signal. With VM on hub 3 200mb down on modem mode connected to a TP-Link Archer C7. It detects the 2.4Ghz WiFi no problem. Connected to this but the RSSI tips 70 sometimes. Between 65 - 70. Seen a ring help page about changing the channel of the 5Ghz above 100. Mine doesn’t go pat 46. Was told by TP-Link that this would be a wifi 6 capable router. Has any one else noticed this with their ring 4 Doorbell? Any help is much appreciated. Cptuk.