Import-Module ADSyncDiagnostics
Invoke-ADSyncDiagnostics -PasswordSync

Example

Issue when password hash synchronization was set as Disabled and Entra connect health was in error state after Migrate Entra Connect DB

PS C:\Program Files\Microsoft Azure Active Directory Connect> Invoke-ADSyncDiagnostics -PasswordSync
Staging mode is enabled. Password Hash Synchronization does not work when staging mode is enabled.

references:

Troubleshoot password hash synchronization with Microsoft Entra Connect Sync - Microsoft Entra ID | Microsoft Learn