Hello Adrian and welcome to the forum 🙂
The TimeTracker app currently does not have a PDF report option, because we have not added one yet. You can create one yourself if you want (inside your own app, reading data from the TimeTracker) - REI3 is a low code platform afterall.
It´s also possible for us to add larger features (such as a PDF report) to the standard app - this happens usually when one of our customers asks for it.