The map yes, but the data source not really

For France again, only information is that the percentage is sourced “From Civil Status”, and I don’t know if this “Civil status” account for marriage only or others unions also. Only source I’ve found on Insee (French civil status public data) accounts only for civil Marriage, and not for other unions: https://www.insee.fr/fr/statistiques/6524902?sommaire=6524912#dictionnaire

SITU_MATRI : Situation matrimoniale des parents (Status of parents)

• DM : Enfants nés dans le mariage (Children are born within Marriage)
• HM : Enfants nés hors mariage (Children are born outside Marriage)
• ENS : Ensemble (some children born within and some outside marriage)