Functional component: Is it possible to update a state without triggering re-render ?

[GTimothy]

Is it possible to update a state without triggering redraw ?

I have a component A with children A1 and A2. A1 is quite complex and A2 is very simple.
I want to update A2 based on callbacks from A1.

For that I use use_state_eq in A to store the property of A2 I want to update (which I do using a callback passed to A1).
I think the call to use_state_eq triggers a re-render of A, when the only thing that changes is A2.

I think I could avoid re-render using a non-functional A that could handle messages without re-rendering but can it be done in a functional component ?