Hi,
https://www.openstreetmap.org/way/1203938630 looks like a riding arena and not like a riding center; riding arenas are usually tagged leisure=pitch + sport=equestrian, see https://wiki.openstreetmap.org/wiki/Tag:leisure%3Dho
rse_riding
There is a special preset for riding arenas in iD, search for "riding arena"
Tagging example from your region: https://www.openstreetmap.org/way/271672943