You can find statements and notices and citations and such on the FCC web site to see what happens if you get caught out. If you're interested in that kind of thing, they're interesting reading.

Here is a pretty bad scenario for apparently willful unintentional radiator violations, where an ultrasonic foot bath company was at best unorganized and slow to comply with testing and labeling requirements: https://docs.fcc.gov/public/attachments/FCC-18-67A1.pdf

Here is a better scenario, where an LED sign manufacturer was a bit more on the ball: https://docs.fcc.gov/public/attachments/DA-22-1136A1.pdf

Note in both cases there is no mention that these devices emitted RF above allowed limits for unintentional radiators. These companies simply didn't test and didn't label their devices appropriately.

Here's one for Asus, where they got WiFi products certified, and then changed something, probably firmware, that allowed those devices to transmit more power than allowed: https://docs.fcc.gov/public/attachments/FCC-24-69A1.pdf