1. Log in to the management page of the router.
2. Find the wireless Settings, you will generally see 5g and 2.4g options to determine whether dual-band is supported.
3. If supported, you can further set them to different SSIDs to separate them and facilitate device connection and management.
4. If you do not see the 5g option, check whether the router supports 5g and turn on the 5g band in the system Settings.
At the same time, if necessary, update the router driver and enable 5g network in the device.