Unable to answer "Are the collection times of this postbox still correct?" for https://osm.org/node/2573180923 via StreetComplete 43.2:

Umm, looks like it's changed its "system".  They should probably use a qr code

Attached photo(s):
https://westnordost.de/p/94072.jpg
https://westnordost.de/p/94073.jpg