Gojira kicks ass but all their stuff is in English.

Unsure if any are active or not, that isn’t something I pay too close attention too personally unless it is local music, but here are a few recs from what I could Google about them being active (or at least not disbanding)

• Alcest
• Blut Aus Nord
• Sortilège (reformed in 2019 after a long hiatus)
• Bran Barr is good folk metal but only two albums though over 10 years, technically never disbanded.
• Amesoeurs (not active but still good)
• ADX if you like speed metal
• Attentat Rock (reformed in 08)

Igorrr is the best metal period, not just French. Very experimental but it goes hard. Imagine Frank Zappa, Aphex Twin and Dead Can Dance writing a metal album and you get Igorrr.