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-
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!!