There is definitely a way to do it, actually the Munich S-Bahn has a realtime map : https://www.s-bahn-muenchen.de/fahren/live-map - not as smoothly animated though, and I'm not sure if the data used there is publically available. As an Easter Egg, the "50th anniversary" train (photo here, but the article is paywalled: https://railcolornews.com/2022/04/26/de-expert-s-bahn-munche...) is highlighted on the map.