Yes, it has been announced that they support "FreeSync". But how is a consumer supposed to know that "G-Sync Compatible" is synonymous with "FreeSync", and not that it is "G-Sync" which is nvidia-only?
They announced support for Adaptative Sync. They have never used the term "Freesync" because they can't as AMD owns that trademark. That name is dumb and can be confusing, but since the majority of G-Sync Compatible monitors seem to list both that and Freesync in etail listings there is s much lower chance of confusion.