Isn't France a secular country?

After King Henry IV of France ascended the throne, he devoted himself to repairing domestic differences in order to avoid another war. So he arrived in Brittany on April 3, 598, and signed the edict of Nantes. This decree stipulates that Huguenots in China can enjoy freedom of belief without state interference, and also have the right to build churches and participate in religious affairs. In addition, they also enjoy the same rights as other citizens. They can also enjoy the same political rights as Catholics. They can hold various official positions. They are also allowed to keep castles and troops for self-defense. But in order to appease Catholics, Henry IV even declared Catholicism as the state religion after signing this decree. (Huguenots are French Protestants.)

Today's France is a secular country that practiced religious freedom at that time, but Catholicism still has some customary rights (French state institutions will stop working during the Christmas holiday, while teachers in Catholic schools will still be paid by the government). )