Hi,
https://www.openstreetmap.org/way/32909501 does not look like a horse riding centre (leisure=horse_riding); it looks like a horse riding arena, and in this case, according to the wiki, should be tagged with leisure=pitch + sport=equestrian, like https://www.openstreetmap.org/way/230577556
The arena seems to belong to Tower Farm Riding Stables (https://www.towerfarm.org/) which could be mapped as a horse riding centre (leisure=horse_riding).
Examples for other horse riding centres in this region:
https://www.openstreetmap.org/way/401986875
https://www.openstreetmap.org/way/33103042
See also https://wiki.openstreetmap.org/wiki/How_to_map_a#Riding_centre_(equestrian)