There was a technical CFO on board/admin level for commercial purposes, but to intent and purposes, Marotta handled the financial side of the clubs operations sporting wise. When he left it was clearly stated that his tasks would be delegated differently afterwards, because his expertise wasnt just running things in basic football decisions, but was financial exec/GM of general operations, the negotiator, in charge of numbers etc, had full authority basically.
This is why we seen Andrea Agnelli be more involved then before in dealings after Marotta (and why he is taking meetings with other clubs GMs/ presidents etc, things Marotta would handled before), and why the job of CFO might slighly be more prominent then before. Paratici doesnt get that same full authority, less experienced/different type of skillset, tho he is in charge of sporting decisions/is a football man mainly with scouting background. The delegation of tasks and hierarchy is bit different (since their experience/qualifcations are different), but the job is still being done, so its fine. Paratici is probably getting a 2nd guy under him in Cherubini, so Andrea can be more relaxed in his role.