Bretagne, Ile-de-france, Pays-de-la-Loire and Provence-Alpes-Côte-d’Azur stay as they are while Centre-Val de Loire only changes its name.
Other regions are:
Auvergne-Rhône-Alpes (based in Lyon);
Bourgogne-Franche-Comté, (Dijon);
Hauts-de-France made of Nord-Pas-de-Calais and Picardie (Lille);
Grand Est made of Alsace, Champagne-Ardenne and Lorraine (Strasbourg);
Occitanie from Languedoc-Roussillon and Midi-Pyrénées (Toulouse);
Normandie joins Haute and Basse Normandie (prefecture in Rouen and council HQ in Caen);
Nouvelle Aquitaine made from Aquitaine, Limousin and Poitou- Charentes (Bordeaux).
Often called a region, Corsica now has a separate status as a “collectivité territoriale”.