Looks like they may be included the Android 7.1.2 beta from January, but I just tried to set up Rogers wifi calling (an option in the settings) but Rogers refuses to accept my phone... "Unfortunately your device isn't eligible for Rogers Wi-Fi Calling. Please reach us if you have any questions at rogers.com/contactus"
Haven't tested volte (I expect it's part of the "enhanced 4g lte mode" bundle in the settings)
Again, I'm part of the 7.1.2 beta testing... This is not the latest 7.1.1 March patch
Looks like I have VoLTE enabled on 7.1.2.beta 2. Now before you go rushing to install beta software on the device, I can't get calls when on WiFi and the WiFi calling setting is not available on my device anymore. I think it's just a glitch with it being attempted to be turned on and Rogers not fully flipping the switch.
I recommend just waiting for the official release.