Uhh.
If you look at the original meaning of overland, the answer is yes.
If you look at the new "inclusive" definition then no.
This is a question that has sparked huge arguments on forums.
If you would have asked me this question in the 70's or 80's I would have answered yes, because overlanding was done in Australia, Africa,.... Basically back country exploring for long distance. Out here it was just called off-roading. If you went off-roading for a few days, you were still off-roading but you were also camping.
Off-roading also had, Mudding, Dune's, Rock crawling, Trails. Then their was exploring which also was called off-roading.
Should driving a motorhome on pavement to a KOA campground be considered overlanding? What if you did it in a Civic? Some people will answer yes to both. Would it be overlanding if either of the two traveled down graded dirt roads? More people will say yes to that today.
I think its just whatever you want it to be.