Does Swarm allow lifepoint policy updates for content after the content has been stored in Swarm?

All unnamed streams (with the exception of anchor streams) are immutable in Swarm including lifepoint policy metadata for whether or not a file is deletable and how many replicas it should have; once you set a lifepoint policy for deletion, you cannot change it in Swarm. If a lifepoint policy needs to be updated, you can use Swarm Search enumeration to find all the UUIDs that you would be interested in changing and re-write them with new policies.