Ah ok! Yes you’d need to stay with nodes. Or use DCTLs to revert from one gamma to another inside ACES. But, NODES are much clearer for this (as you now know).
One big problem I have with the “regular” ACES. mode in Resolve is how all things created in edit (transitions, titles etc…) just slams into ACES unmanaged (for example). With nodes I can bypass these problems.