There don't seem to be covenant armor sets for the new renowns, the only ones that match are the dungeon sets (Tuskarr is leather, Centaur is Mail)
If we aren't getting a lot of armor at launch like Shadowlands (dungeon, questing, 4x4 covenant sets, raid) maybe we are going to get heritage this expansion to balance out? They had to pump 16 sets for the covenants but they have more free time now.