They do take it mostly into account for IC(E) journeys and some regional trains.
You will usually have an announcement like "Alle Anschlusszüge werden weiter erreicht werden" oder "Zug nach $ort wartet auf uns" here.
It just doesn't propagate to traffic within a federal regional (Bundesland) a lot which sucks but is somewhat understandable (the frequency there is supposedly high enough although connected journeys kinda break this).
You will usually have an announcement like "Alle Anschlusszüge werden weiter erreicht werden" oder "Zug nach $ort wartet auf uns" here.
It just doesn't propagate to traffic within a federal regional (Bundesland) a lot which sucks but is somewhat understandable (the frequency there is supposedly high enough although connected journeys kinda break this).