Secure Data Storage for WinUI application

UWP being a sandboxed application had a way to save data using PasswordVault/Credential Manager, but WinUI doesn't offer the same level of security since other apps can access the data. DPAPI also doesn't provide a good way to protect the data as any app running in the same User Context can unprotect it. Adding entropy helps, but where do I store the entropy? Can somebody help me understand the mechanism for storing data securely in Windows App SDK?