Hi,
Du hast das building=yes von way/487049625 entfernt obwohl es ein Gebäude zu sein scheint.
Und das Tag leisure=horse_riding ist nicht für Gebäude, sondern für Reitanlagen, siehe osm.wiki/DE:Tag:leisure=horse_riding

Hi. This area looks like a riding arena and not like a riding centre, compare
osm.wiki/FR:Tag:leisure%3Dhorse_riding

And way/1160300784 seems to be building too. If it is an indoor arena you can use tag building=riding_hall for this.

Hi,
It looks like you have removed the tag building=yes from way/919997119 although it is a building. You have instead tagged it leisure=horse_riding, but this tag is not for buildings, see wiki page leisure=horse_riding

Hi,
way/987344290 seems to be a riding arena (leisure=pitch + sport=equestrian) rather than a riding centre (leisure=horse_riding); compare leisure=horse_riding

Hi,
How could the small round areas
way/1159124515
way/1159124516
be used for horse racing?
I assume they are round pens. In this case I would recommend leisure=pitch + sport=equestrian (preset for riding arenas).

Hi,
You have removed the building tag from this building; there it is no longer visible as a building on the map.
Also the tag leisure=horse_riding is not for specific buildings but for the whole area of the riding centre, see
osm.wiki/Cs:Tag:leisure=horse_riding
way/996881706

Hi,
an relation/5505101 hast di das building=yes entfernt, deswegen ist das jetzt nicht mehr als Gebäude auf der Karte zu sehen.
Mit leisure=horse_riding sollte man auch keine einzelnen Gebäude, sondern das ganze Gelände von dem Pferdehof taggen, siehe
osm.wiki/DE:Tag:leisure=horse_riding
way/1125251227

Hi,
I think, version #1 of way/1158569480/history was better than version #2; this area isn't large enough for horse_racing. And the tag leisure=horse_riding is not for stables, indoor arenas, etc. but for the whole facility, so I think it is misplaced on way/1158569477 and way/1158569478
Compare
leisure=horse_riding

Hi,
This is not an equestrian centre, it is just a riding arena, see osm.wiki/FR:Tag:leisure=horse_riding

Hi,
way/1157643648
and
way/1157643649
look like riding arenas and not like riding centres.
Riding arenas should be tagged leisure=pitch + sport=equestrian.
Compare
leisure=horse_riding
way/1086867552 Horse Club 67
way/1126163328 Circolo Ippico Braida dei Perini

Tradotto con www.DeepL.com/Translator (versione gratuita):
Ciao,
way/1157643648
e
way/1157643649
sembrano arene di equitazione e non centri di equitazione.
Le arene di equitazione dovrebbero essere etichettate come tempo libero=pitch + sport=equestre.
Confronto
leisure=horse_riding
way/1086867552 Circolo Ippico 67
way/1126163328 Circolo Ippico Braida dei Perini

Hi,
You have removed the tag building=yes from
way/186455386
way/186457318
way/186459012
way/186458264
and replaced it with leisure=horse_riding (riding centre). This makes no sense and has caused the buildings to disappear from the map. Every building should have a building tag. For special types of buildings you can use
osm.wiki/FR:Tag:building=riding_hall
osm.wiki/FR:Tag:building=stable
The the tag leisure=horse_riding is indended for complete riding centres and not appropriate for these buildings that are only a part of a riding centre, please read
osm.wiki/FR:Tag:leisure=horse_riding

Hi,
I don't know what way/1157463346 is, but it doesn't look like a riding centre and maybe @valhikes/diary/401189 (mentioned in weeklyOSM 661) can inspire you.

Stimmt. Entschuldigung.

Hi,
warumm hast du denn an way/204045392 das building=yes entfernt? Auf den Luftbildern sieht es aus wie ein Gebäude.

Here:
https://github.com/openstreetmap/id-tagging-schema#Translations

Yes; this iD preset was recently renamed, see
https://github.com/openstreetmap/id-tagging-schema/pull/780/files
Was that the reason why you didn't find/select it right at the beginning?

Hi,
Isn't way/1156989217 a riding arena? Riding arenas should be tagged leisure=pitch + sport=equestrian, see
leisure=horse_riding
way/1102858584

Hi,
Isn't way/1156988475 a riding arena? Riding arenas should be tagged leisure=pitch + sport=equestrian, see
leisure=horse_riding

Hi,
Isn't way/1157081622 a riding arena? Riding arenas should be tagged leisure=pitch + sport=equestrian, see
leisure=horse_riding