The only permission I have enabled for LG ThinQ is notifications. I also have a Home Assistant integration that has access to my LG washer/dryer

For what it’s worth, my LG washer has sent 14.3 MB in the past MONTH, but my Unifi router has misidentified my Nvidia Shield TV as another LG washer. The Shield has downloaded 11.6 GB in the past month, mostly from YouTube. While I don’t doubt it’s possible for a washer to send/receive that much data if it’s compromised and part of a botnet, I’d also question whether the device in question is actually an LG laundry appliance.