Creating secure strings isn't exactly fixed; the type exists but they aren't encrypted in memory on Linux because it doesn't have the DPAPI (Data Protection API

Creating secure strings isn't exactly fixed; the type exists but they aren't encrypted in memory on Linux because it doesn't have the DPAPI (Data Protection API) from Windows: https://github.com/PowerShell/PowerShell/pull/9199 https://github.com/PowerShell/PowerShell/pull/9199