Before FAANG the acronym was MAFANG, but due to too much closeness to a slang word, the political correct crowd change it to FAANG. Also, just as a side note, Microsoft is a trillion worth more than the "G" in FAANG.
The FAANG acronym was actually about growth rather than size, and their stock was performing like a tech stock for a while. But yes, they don't belong because they're actually a media "manufacturing" business, although a successful one.