You can certainly set up approvals in PIM. However, having at least two "break-glass" GA accounts is recommended, so you can use this as an excuse :)
As detailed in the official guidance on this, the account(s) should have permanent assignment as to remove any dependence on PIM. To prevent any abuse, store the credentials for said account(s) in a manner that requires additional approval (for example, use a FIDO key stored in a locked cabinet/safe and make sure the GA does not have direct access to it).