Platform alterations happen in Germany too. They are less common, though, because most stations are very generously supplied with platforms, owing to the combined efforts of the post-1871 regime and the RAF. Köln Hbf is the only exception I can think of, and so it is worth providing printed information (e.g. the Reiseplan on IC/ICEs).in Germany you can print out or see on the DB app the scheduled platform. Maybe an electronic notification is a more reasonable expectation rather than the pretty low-tech tickets that are widely used.