I can't say if this specific one is authentic but I would not be surprised, as my company does the same: branded pride flags, t-shirts for their LGBTQ+ employees.
And I'm torn on this, because I feel a bit bad about the branding aspect of it, but on the other hand the company putting their name to openly support all sexual and gender identities does seem like a good thing to do....
Yes, the irony of a company that produces more efficient ways of killing people being concerned with social issues does not escape me. But there are employees of the company who apparently support both (and good for them)