EU-wide tenders for scheduled services usually only allow full low-floor or low-entry vehicles due to a lack of accessibility for passengers with reduced mobility. Since January 1, 2022, according to EU directives,
high-floor buses (without wheelchair lifts) are theoretically completely no longer allowed,
unless the district or city authorities specifically request exceptions, for example for purely school bus services. However, most districts prohibit this directly in their tenders.

This means that such vehicles are now only in operation in places where the services have not
yet been put out to tender and are still operated as private concessions or
in the school bus services outside of scheduled route services.
So far, however only in Germany the EU regulations have been implemented so strictly...
In many other EU countries, high-floor buses are still standard in intercity transport.

But there are also fewer and fewer manufacturers who still build those high-floor
or combi buses for scheduled services.