Running a function when reactive state changes

[FickleLife]

Using https://stacked.filledstacks.com/docs/in-depth/viewmodels#reactiveviewmodel I have a reactive getter with some data in it. The data changes in the view of all the view models that are listening to it. I would also like listening view models to run a function when the data changes, but it appears that only the view is reactive.

Is there a way to have a function run in listening view models when the data changes?