I always thought it was but I haven't checked in about 10 years or so. I don't see it on the list but I've never heard of anything special in an ATF+4 transmission that would require something outside of a quality ATF.Is Maxlife considered an ATF+4 equivalent?
https://www.valvolineglobal.com/en/maxlife-multi-vehicle-atf/
DCT, CVT (now covered by many ATFs) and HD ATs (Allison) would definitely be outside of what I'd consider a generic, quality, Dex6 ATF like Maxlife.