@MiniMinute 

Use a different device such as your smartphone to see if the issue is happening on that.

If so, try doing a factory reset on the router by holding the reset for 15 seconds. The three default TP-Link wireless network should now be showing. 

If the 5Gs are still missing, upload the latest firmware on the router, even if it already does have it. 

Reaching out to our support may be needed if none of the above help.