Does this mean VoNR is enabled?

It is not stable. And here VoNR doesn't work on N28 band but works pretty good when I am on N78 band. So, it could be the same issue.
 
It is the same for me too.
N78 band, will show up as VoNR SA in settings (notification icon shows up as VoLTE) and while calling switches to LTE.
 
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