@OnyeNacho You are able to continue downloading your UE4.27 MetaHumans into UE4.27 projects until the final deadline.
If you did want to continue authoring them in the future you can do as @Feeding_Wolves suggested earlier by using conform > import dna in UE5.6+. If your UE4.27 MetaHumans were created before MetaHuman 1.0.0 was released (June 2022), they will have been duplicated as a UE5 MetaHuman too.