Go to https://it.wikivoyage.org/wiki/Firenze#Cosa_vedere
Click on the first marker (the blue box with "1" inside) to open the map
In the map footer is just written "1" (i.e. the POI number)

Now, go to https://de.wikivoyage.org/wiki/Florenz#Kirchen
Click on the first marker (the blue box with "1" inside) to open the map
In the map footer is written "1: Duomo Santa Maria Del Fiore" (i.e. the POI number + the POI name)

In de:voy it is done through a dedicated Javascript, but since:

1. all the information are already present server-side
2. the footer is not used for anything else

it could be great to add this feature in order to make it available to all the Wikivoyage languages without implementing a JS gadget