The results are here: https://www.vie-publique.fr/actualite/alaune/changement-heur... and 2 103 999 persons answered it, with 83.71% being in favor of dropping daylight savings time.
That served as a basis for the French government's contribution to the draft that was voted on at the EU parliament. The draft didn't drop from the sky, it was written by the European commission, which is made up of representatives from all EU countries.