rewards property
If the entity to which this component is attached has known active Rewards for the player, this will detail information about those rewards, keyed by the RewardEntry Hash. (See DestinyMilestoneDefinition for more information about Reward Entries) Note that these rewards are not for the Quests related to the Milestone. Think of these as "overview/checklist" rewards that may be provided for Milestones that may provide rewards for performing a variety of tasks that aren't under a specific Quest.
Implementation
@JsonKey(name:'rewards')
List<DestinyMilestoneRewardCategory>? rewards;