The post above by @jamesralexander is very helpful and I’ve wanted to understand this better myself.
Here is a “bare bones” app that demonstrates using raise_event_on_children
I hope this is helpful for whoever might need an example.
clone:
https://anvil.works/build#clone:3NDEAUILXHPGMJ7K=GNRRKY7ETSU2GQEDUT2EEIV6