Not necessarily. Depending on your situation, choosing the law governing your matrimonial property may be enough. Adjusting or changing the regime may also be useful. It depends on your marriage date, destination and assets.
For couples married between 1 September 1992 and 28 January 2019 without an agreement or choice of law, the applicable law may change automatically, particularly after more than ten years in the new country. For couples married since 29 January 2019 there is no automatic change, but the default law is not always the one they expect.
A choice of law and marriage agreement are made before a notary. My role is to identify what needs planning under French and destination-country law and to check that the choice will be recognized there.
I support you before departure, working with your notary.