there’s a common issue with the 5GHz card - it’s not recognized when the system is warm-started (i.e. after a reboot). Try to completely unplug your router from the power, leave it unplugged for 20 minutes, and then plug it back in. See lspci if it’s recognized.
In my case, this issue is 100% reproductible.
If it doesn’t work even after this, your card might be faulty.