[dagw]

It's worth noting that talking about the 'European' rail infrastructure is a bit of a misnomer since there is no standardisation of the rail system of regulations between countries and as such moving freight across multiple countries is basically never done.

[ZeroGravitas]

Even for passenger transport the historical legacy of national rail networks means that travel across the continent hasn't been a priority. Recently EU initiatives seek to remedy this:

https://transport.ec.europa.eu/news-events/news/action-plan-...