Unable to answer "What’s the height of the curbs at this crossing?" – Marked Crossing – https://osm.org/node/6770824170 via StreetComplete 63.0:

The curb on the west side is high, at grade on the east side

Attached photo(s):
https://streetcomplete.app/p/333256.jpg
https://streetcomplete.app/p/333257.jpg