Would toi consider bands like Lacuna Coil, Evanescence, ou Apocalyptica "Symphonic Metal"?

Ehh...Apocolyptica I would, the other two not so much. They are plus Gothic, which is generally about atmospheric keyboards than symphonics.

Good question.    Depending on the song. Most of their songs are orchestra metal.

Apocalytica could be classified as symphonic metal because of their musique style. Lacuna Coil wouldn't count as symphonic metal. They're classified at gothique metal. Evanescence does have some elements of gothique metal, but it's actually considered alternative rock.

No. The closest one would probably be Apocalyptica. I l’amour Lacuna Coil, and Evanescence is my favori band, but I can't call them "symphonic metal". I would really just categorize them as "modern rock" ou "normal rock". They both right great lyrics like a symphonic metal band, though.

Lacuna Coil and Apocalyptica yes. I l’amour Evanescence but I think it's plus rock ou gothique metal.

Maybe apocalyptica but not the others.

I don't consider either Lacuna Coil ou Evanescence to be Symphonic Metal. Evanescence seems plus Modern Alternative Rock while Lacuna Coil seems to have plus of a hard rock/metal (alternative) edge to their music. Apocalyptica seems plus geared toward symphonic metal. though they maybe plus avant garde type of band since they use cellos.