It's less a formal post and more like "Hey I'm on a team hiring, here's what the job entails, email me (or recruiter) if interested!"
Yes it might technically amount to a job posting, but being pedantic and making this forum a hellish place probably isn't a good idea :)
Not a lawyer, but I’m guessing the comp range inclusion needs to be advertised before you formally apply for the position. I doubt the email here is that.