Is MTS Mobility included under Bell Mobility Canada for SMS?

I'm on MTS Mobility (in Manitoba, Canada), which is often partnered with Bell Mobility Canada (as Bell is national and MTS is provincial). Does MTS Mobility fall under the umbrella of Bell Mobility Canada in Sandy's "Mobile" settings, or am I out of luck for the time being?

I tried getting an SMS confirmation code using Bell Mobility Canada as my provider, but I haven't received anything back in an hour and a half, which is making me wonder if MTS is included.