You may check the timetable for your given date in August here to get the timetable earlier: EN - Trenitalia. There will be many trains.

They will appear in other timetables, too (when Trenitalia does deliver data).

Thank you. As of now I don’t see any trains in the afternoon/evening.

They don't import the trains at once. You may have a look at the current timetable to get an idea about what will run; there won't be that many changes. Many trains are just published up to 29.7., just a few trains for later dates but it seems they do appear now piece by piece.

Got it. That was helpful. Thanks.