There's a fix to Samsung shipping the Galaxy S21 with the wrong CSC - SamMobile
List of Samsung Galaxy CSC Country Specific Product code and region they belong to
Tarun Vats on X: "Breaking News 🔥 As Expected, Galaxy S21 Series gets OneUI 5.1 April update in Europeon Country (Switzerland,Germany) My Indian S21 friends, Change CSC to AUT or DBT and