While looking for a solution for exactly the same problem as the OP , I came across this forum. Sometimes wifi works, sometimes it doesn't. Also dual boot with Windows, and in Windows wifi always works perfectly. When wifi does NOT work, inxi shows:
Network:
Device-1: Intel Wireless 8265 / 8275 driver: iwlwifi
And iwconfig then shows:
l0 no wireless extensions
I cannot show what it would normally say when wifi is working, because regardless of how many times I reboot my pc, wifi doesn't work