I can't the personal vault into my onedrive account

Personal Vault is not available for OneDrive for Business accounts, only regular (personal) OneDrive.

https://support.microsoft.com/en-us/office/protect-your-onedrive-files-in-personal-vault-6540ef37-e9bf-4121-a773-56f98dce78c4

I can't find the personal vault into my onedrive related to my 365 account, anyone can help how can I do so .