IRG-Rail has published report on Impacts of the COVID-19 crisis on European railway markets in 2020
The regulatory bodies of IRG-Rail examined the impact of the Covid-19 pandemic on the European rail sector in 2020.
The pandemic and its aftermath generally led to a decline in rail transport demand in 2020. For example, the decline in annual passenger kilometres averaged 48 percent in Europe, with the second and fourth quarters showing particularly large declines.
You can find the Report from the Rail market-page (External link).