All routers have a 5G receive and send transceiver in them, worldwide. Since 2014. Just regular 2.4G standard router WIFI does this…can you fathom what the 5G does to you if it is enabled in your router.
Guess what. By default, IT IS enabled. I had to manually turn mine off, which I did 3 years ago. And keep all WIFI turned off in my home.