I need to allow staff to create expense or bill and then Approved by other

I need to allow staff to create expense or bill and then Approved by other

How can I let staff create and expense or bill and then it gets approved by other staff.

I need a way that staff record a bill or expense but it should not be processed by them, it should be processed by someone else.

I dont want the staff to see other bills or be able to record payment, only create a bill or expense

Hope there is a way for it.