Most people over estimate how effective CE marking is.
For example, CE only prevents people from selling products. For example, I’ve done pilot tests (city wide installations of urban equipment) with devices that, while I knew they’d be compliant, we had done 0 tests.
It’s also fairly trivial and common to cheat at the tests. Most EMC testing is done in conditions that aren’t necessarily the normal operating conditions and with “accessories”.
If anything else fails, aside from medical or safety critical devices, you could always self certify and roll the dice, it’s way more common than what people think.