During the beta unrated matches mattered, and our rank will not carry over to the launches ranked system.

Does unrated games affect Ranked Valorant?

Even after the competitive ladder is unlocked, your unrated matchmaking and match scores will not affect your competitive placement. Once these have been completed you will have access to the ranked mode.

Does Unrated affect MMR Valorant?

Nobody knows but it shouldn't. Either way you won't rank down playing unrated. No I think it affects initial placement but shouldn't affect it after that.