Can an Instagram page be "hijacked" if they know the password from the account, from the linked mail, but without access to the phone?

Question

Instagram

Delegated work on Instagram to the manager. He has a login and password from the page, and a login and password from the mail attached to it, to confirm when the account is frozen due to suspicious actions.
Can he hijack the account if a phone is also attached to it, and only I have it?

Answer 1

Of course they can