How to bring control mechanism during Order Submit in Fusion

I have the below query related to Order Management in Fusion

Customer Requirement: Need to have some kind of control mechanism at the time of Order Submit.

For example, the user who prepares the Order (i.e Order Entry) should not be allowed to Submit the Order. Instead, another user who is also with the same role as the Order preparer should be able to Submit the Order. This is more like a maker-checker combination where both the maker and checker have the same role. We explored the possibility of achieving this using the Order Management Extension task. However, the groovy code here doesn't support the use of all the Order attributes which limits us from putting some restrictions.