Fortnite Account Merge Across Platforms

I need to merge my Fortnite accounts from Xbox and PlayStation into a single primary account. This task involves consolidating both my progress and in-game items from the secondary accounts into the primary one. All accounts are already linked to an Epic Games account.

Skills and Experience Required:
- Proficient understanding of Fortnite and its account systems.
- Experience with account merging, particularly across different gaming platforms.
- Familiarity with Epic Games account management.
- Attention to detail to ensure all progress and items are correctly merged.