Until now, rollups and formulas dependent on rollups/relations could only be used in view components. Now, you can use rollups & formulas to view data in the list, filter, sort, etc.
However, there is a limitation to this capability. When you choose a property to view in the lists that is a rollup or formula dependent on a rollup, and if the formula is calculated over more than 25 related pages, Notion provides NotionApps results based on only the top 25 related pages.
You can read more about it here, https://docs.notionapps.com/customize-app/formulas-and-rollups.