You must be German — the French state is a lot more top down than Germany with its regions, so generally these kinds of mandates get applied broadly
Oof, that's just offensive!
Anyway, most German Linux 'mandates' were indeed regional, and (for good reasons!) failed to migrate 'upstream'.
Whether the French mandate takes hold remains to be seen. "We're not Germany" is not the end-all argument it might seem to be to you.