A slide that says eighty percent complete tells you nothing. An installable artefact tells you everything.
From the second sprint onward, every fortnight ends with a signed build on TestFlight and the Play internal track, a changelog written in plain language, and a five-minute walkthrough video. If a feature is not in that build, it is not done, whatever the board says.
The discipline costs about half a day per sprint and it removes the single most common cause of a late, surprising project.