Yes, that's why the risk is NOT the same between French Guiana and New Caledonia. Both of them are oversea territories far from the mainland with a colonial past, but their current relationship with the mainland is very different.

Around a quarter of the population of New Caledonia has been calling for independence for decades at this point, with 3 referendum organised during the last 10 years to resolve this issue. Only half of the population was able to vote to the referendums (and some local elections, like Congress of NC), due to local rules than are about to change–this, incidentally, is the cause of the protests you are talking about. On the geopolitical side of things, the independentists are probably propped up by Azerbaijan (https://www.courrierinternational.com/article/geopolitique-n...) and maybe China (https://www.lefigaro.fr/international/ambitions-geostrategiq...).

None of this holds for French Guiana. The risk between these territories is not the same. At all. Putting them on the same level by reducing them to their status as former colonies is nonsense.

More info here: https://en.wikipedia.org/wiki/Wikipedia:Copyrights

The EU cannot legislate on national security matters.

Maybe, but at the same time it helps avoiding crashes like Sriwijaya 182 or Flydubai 981. Airbus has shown that planes with fly-by-wire and any kind of flight envelope protection (A320 and newer, A220, B777 and 787, etc.) experience less fatal accidents and less hull losses than planes with traditional controls (A300, A310, B737, etc.), even today: https://accidentstats.airbus.com/fatal-accidents/

Unfortunately, these safety improvements mean that we only hear about cases where automation fail to help, like in the case of AF447, but not cases where it prevented an accident.