All the winners round maps are located in the forgehub features forum: Featured Halo Maps - Forge Hub and all the losers are located in the conflict discussion forum: 1v1 Conflict Tournament - Forge Hub They had talked about creating a listing of all the maps but I couldn't find it yet so probably once they're all released they'll do that.
Winner's bracket maps are in the Featured section, but here's the individual threads with all of them listed so far. Round 1 Round 2 Round 3 Round 4 Round 5