I was too, before several media channels opposed to domination/oppression/exploitation systems revealed it.
Well, most information traveling through continental european ("mainland") part of France are "mainland"-centric. These are even often centered around specifically some big cities or the Île-de-Frane région (including Paris).
Those of us who, like me, are not descendants of colonised people will have to follow decolonial or anticolonial circles to get decent information about what happens outside of our bubble. I mean when even a ministre, now president, confuses Guyane with an island, we've got some serious progress to make toward equality...
Like some people from independant media say, colonial empires never really ended, they just transformed their surface-level appearance.