I doubt we'll see the tag anytime soon in this forum for the simple reason that, in my albeit limited imagination (I've never personally taken a robotics course), I struggle to foresee many questions where it is necessary to know that the context involves homework.
In math or computer science, many exercises are fairly contrived, because they serve to illustrate a principle, and the standard answer to a homework question being asked out of context is to say "Why on earth would you do that in the first place?".
In don't think the same is necessarily true for homework in a robotics course as I'd expect most questions to be quite sensible without having to know that they involve a homework assignment (again though, correct me if I'm wrong as I lack first hand experience).
To directly answer your question though, no, we should not allow the homework tag here for the exact same reasons. There's no issue with homework questions. But the poster should put enough effort into the question to make it a worthwhile question without people having to know it's a homework question.
If you want an intuitive reason for why the tag is discouraged, think of who would search for our subscribe to the tag on it's own.
In practice though, I'd suggest crossing that bridge when we actually come to it. I'd expect most students to avoid announcing that their question is homework if they can