Unable to answer "Are the pickup times of this collection box still correct?" – LVZ-Post (Mail Drop Box) – https://osm.org/node/5501717671 via StreetComplete 63.1:

Printed times on the box match the data. Someone used Edding to 'correct' entries to Mo-Do 14:00, Fr 15:00. It seems unclear toe whether this is official. It doesn't look like vandalism though.