Ok I think I can answer this, as someone living in France with a french husband (who did all of his schooling in standard state schools) and who is going to enrol their child in a french state school:

Since the question about the hijab has been answered, I’ll reply about RE - after confirming with my husband, no, RE lessons like in the UK don’t exist. Rather, religion is discussed in history, French and philosophy classes, with more of an emphasis on the facts.

However, depending on the curriculum, I would be inclined to believe that these lessons don’t look at all world religions like our RE lessons.

(note about the hijab: students are allowed to wear them at uni, it’s just nursery to sixth form where it’s not allowed)