There's a lot going on there, and it's not just vehicle design. Many countries have brought in reduced speed limits in urban areas, usually 30km/h, for instance. Your chances of dying if hit by a car at 30km/h are dramatically lower than 60km/h. Many countries also took the opportunity of COVID (roads not busy, construction industries in need of life-support) to improve cycling infrastructure. And rush-hour traffic is usually not as bad as it was, due to WFH.

In Ireland, public transport usage now is also much bigger share of commutes than pre-covid, particularly in Dublin, though I'm not sure if that's due to local factors or if it's replicated across Europe.