Use an Index across multiple sheets

Hi

I've created a sheet with an index and have created a slide filter (so users can select the top N regions in terms of sales).

I have another sheet which uses the same data source and shows sales by region.

I've clicked on the filter container (top right) and cannot see the 'apply to worksheets' option.

What can I do to apply the same filter to both worksheets in my dashboard?

Many thanks

Andy