25 days Admin restore (Drive): admins can recover certain deleted Drive items for up to 25 days after a user empties Trash (after that, items are purged and can’t be recovered).
30 days Gmail Trash: users can recover messages from Trash for up to 30 days; after that, messages are permanently deleted from Trash and can’t be restored from Trash by users/admins.
Not a backup Google Vault: Google states directly that Vault “isn’t designed to be a backup or archive tool” (it’s for governance/eDiscovery workflows, not operational restore).