Correct way to update the state of module B when module A changes?

Question

redux

Example, I delete the comment, it is deleted on the server and on the UI.
Now we need to update the comment counter for the post, and this is a state in another module.

1 - cause a mutation of another module in the action of the module where eg B actions -> mutate A is being removed
2 - call the action of the module from the pomponent upon completion of the operation
3 - emit the event and listen to a specific event
4 - monitor the changes in the length of the comment list in the counter component

Possible and other options, which is preferable, when and why?