They don't care what the product can technically do, they care what people think it does, if it can actually do that. The Flipper Zero is openly advertised as a hacking device.

Governments should not be understood as if(!follows_law) punish(); it's rather if(seems_bad) {if(follows_law) {change_law(); punish();} else punish();} else if(rand() < 0.1) punish();

Regulatory authorities aren't exactly known to care, customs officials even less, and the laws backing both are sometimes damn insane, especially when anything RF is concerned.

There are countries where you technically need a ham radio license to import a radio, even if you are theoretically allowed to use it just to listen.

And? Are you allowed to buy and own a gun because of your point you are trying to make?

No

In germany radio frequencies are also protected. For citizen band / CB above channel 40 you need to register yourself. Every radio device needs to be certified. The only people in germany allowed to build their own radio devices are people with a amateur radio license.