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Is there a recommended way to reuse the same Android ViewModel between different NavHost destinations? BTW I’m using Compose Navigation.

That's what the SharedViewModel pattern comes in. Set the ViewModel to the graph scope and access it from each route.

Is there a link to some documentation about this so I can read up on it?

The Documentation on the Koin website discusses using Activity/Fragment but it would nice to have the VM scoped to a nested graph.

<https://stackoverflow.com/questions/69642441/how-to-share-a-viewmodel-between-navgraph-components-only|https://stackoverflow.com/questions/69642441/how-to-share-a-viewmodel-between-navgraph-components-only>
Check above link for how you would do it without koin. To adapt koin, koin has a function that resolves the ViewModel given a ViewModelStoreOwner. So basically you would get parent NabBackstackEntry from the current backstackentry and pass it to koinViewModel