Definitely not officially. You can get expansion clients like Novetus+ or the abandoned Novetuslabs ones on the discord, but that's more like a last resort.
Viewing post in Will there ever be 2012 and 2013 clients?
Plus so far there hasn't been a single client that works later than 2014 with the launcher without heavy modification. 2012 Has been done before in the days of RBXLegacy, but that is long dead and no longer supported, and you're better off either waiting for announcements, for getting desperate and giving in to mods. You'll never find a server for RBXLegacy either, plus the 2012 RBXLegacy if you can find it doesn't load a leaderboard either.