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Google have disabled the "Request Indexing" feature of the URL Inspection Tool, in order to make some infrastructure changes. They expect it will return in the coming weeks. You can index content through this regular methods:
https://developers.google.com/search/docs/guides/intro-indexing

Google have disabled the "Request Indexing" feature of the URL Inspection Tool, in order to make some infrastructure changes. They expect it will return in the coming weeks. You can index content through this regular methods:
https://developers.google.com/search/docs/guides/intro-indexing