https://www.openstreetmap.org/node/2926506889

Is there drinking water available here or not? It can be water fountain, water tap, maybe even hand pump, spring and so on.

It is marked as

amenity = drinking_water
disused:amenity = drinking_water

so it is marked as both active and disused at the same time.

If it is closed during winter then seasonal=yes would be much better

Τοπική Κοινότητα Λαγκάδας δημοτικού διαμερίσματος Μαστοροχωρίων.
Ενα από τα δώδεκα μαστοροχώρια σε απόσταση 6 χιλμ. από τον Σαραντάπορο σε υψόμετρο 945,00 μέτρα στο χώρο της Ιεράς Μονής Παναγίας και όχι όπως λανθασμένα ανγράφεται ως Άγιος Δημήτριος.

1) Stomion Monastry is much closer to the dirt road than shown in the map
2) Most of the dirt road from Konitsa to Stomion Monastry is a dirt road appropriate for a 4X4 vehicle.