5.8 Ghz connection

My internet server gives me a WiFi 2.4 Ghz connection and another 5.8 Ghz connection, in principle faster than the first one.
I use a Rasp 3 with Volumio and I only see the 2.4 GHz connection. Why don’t I see the 5.8 GHz connection? Is there a way to fix it?

I think the dual-band wi-fi (2.4 and 5 GHz) was introduced with the R Pi 3B+, if yours is a plain 3 or 3B, then it may only do the 2.4 GHz wi-fi connection.