Hi Paresh and thank you for your answer. I forgot to mention I did try that earlier. It's still showing empty and I took a screenshot. Might this be due to the fact we've made actions named "Call [no answer] "? I tried that also in the search but no luck.

Hi Jarmo:

You should be able to use the filter Activities contains "Call" on the Leads list view.

Another option is to go to the Activities view by clicking on the activities icon on the top right of the screen. This provides a summarized view of all the scheduled activities across the Leads.