not now we have to wait

I read in a comment that m3s will have no android update this year and maybe it is never planned

Maybe in next year or July... It might get 6, but it is not confirmed to get 7.

Only a select few devices will be getting Android nougat update. M3s won't be getting nougat update.
You can post a request for Android base update for m3s in the suggestions sub section.