Unable to answer "What’s the height of the curbs at this crossing?" – Unmarked Crossing – https://osm.org/node/1712154720 via StreetComplete 57.1:

South curb is higher than the road but the north side has a curb ramp

Attached photo(s):
https://westnordost.de/p/201592.jpg
https://westnordost.de/p/201593.jpg