Unable to answer "What kind of building is this?" – https://osm.org/way/1057947966 via StreetComplete_ee 56.1:

Location appears to be a care home ran by Stonepillow. Wheelchair ramp is present outside. Not sure what to classify it as sadly, hopefully someone else has an idea. Thanks!

Attached photo(s):
https://westnordost.de/p/200226.jpg