As we are transitioning to the Unified Interface, some visual cues are a little misplaced or say, hidden.

If your Roll-up field on the Classic UI appeared like this where you could simply click on refresh and update the Roll-up field

It doesn’t seem to be the case in terms of UCI-

It’s Hidden!

So, simply click on the Calculator icon –

And the Recalculate button will be revealed which updates the value

And results into the below in my case –

Note: Toggling the calculator icon will reveal/hide the button.

Hope this quick tip helps!!