Is this a feature of Get Involved or do I just join a location focussed group in Community and answer questions.
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It is listed under Get Involved> Overview - scroll down to see:
which redirects to the Volunteer link (bottom of some FamilySearch pages) where you see:
which directs you here to Community (not Facebook - but sort of Facebook-like).
So yes, either join a Group - especially if you have localized expertise:
Currently requests for research assistance kind of end up in a variety of Categories:
maybe FamilySearch Community will start putting those under Get Involved: