Whois does not show “domain” object for reverse zone

Hello, Document says you need to create "domain" object and RIPE would create reverse DNS zone. If so -- why there is no any domain object in RIPE whois even for networks with reverse zones? 77.88.21.11 is yandex.ru (according to DNS reverse zone) for example, but I can't find "yandex.ru" domain object via this tool: https://apps.db.ripe.net/search/query.html?searchtext=yandex.ru Sorry for silly question, I am new to ripe. thank you.