You already run the one function where nothing may fail silently and every change needs an audit trail. APOP runs your whole operation that way, and plugs into the accounting stack you live in.
APOP was not designed in a lab. It grew out of one operator running real closes, reconciliations and multi-entity cleanup at a scale one head could not hold. Every mechanism on this page survived actual month-ends. That is why the controls feel familiar to a CFO: they were built by someone who had to answer for the numbers.
A working session, not a pitch deck: your categories, your rules, and where governed autonomy would pay off first.