I just saw that it was removed last night. I've had every Note since the N3, and I *think* it was first on the N4? N5? Anyhow, I've use the HR & O2 monitor as well for years. I have several cardiac & thyroid issues that require me to. They are all pretty accurate compared to my finger monitor, which I was happy not to have to carry around anymore.
Maybe this is a push to sell the watches, lol? I do have the Gear S2 Classic, but haven't worn it in a while. I'll probably be getting the Active 2 when it's released. But I really would love if it returns with the Note 11 tho!