Is a strawberry a wild berry?

Answer 1

There are wild strawberries, but the overwhelming majority of strawberries you will ever personally see are cultivated.

However... you may be referring to the common phrase/flavor "wild berry/wildberry", which usually does include strawberry as one of its constituents (with the others usually including raspberries, blackberries, and sometimes other berries). In general none of the berries used (if ANY actual berries are used) are actually "wild" in the sense of "growing uncultivated".