Looks like it from their software update page -- https://support.t-mobile.com/community/phones-tablets-devices/software-updates#tmoSUPDocTitle.
[edit] Or actually it may not be yet. May just be a security update since this is still in the "They have agreed" stage. I thought it was under completed because I clicked that but .. Didn't change over ^_^.
Wow. Is it the N ?
Nice. My wife loves itNot nougat but phone is running pretty good today after update, no factory reset either.