As your own quote implies, even bull bars can be type approved. There is no reason why a Cybertruck couldn't.
So: 1) the regulation you said does not exist does in fact exist,
2) it may be one of the reasons the Cybertruck is not yet type approved.
Time will tell, if and when Tesla manages to register it, possibly with some changes to the construction. Or it will deem the EU market too small for that.