Greetings from Syncfusion.
We have validated your query, you can set either a single view model to the content page or separate view model for each listview based on your requirement. We have created a sample for this. Please find the sample from below link.
In this sample, we have added three-tab item with listview as the tab item content and set the separate view model for each listview.
Please get back to us, if you have any other queries.
Muneesh Kumar G.