At 8:40pm Oct 14, 2020. Google annouced the disabling of the “Request Indexing” feature of the URL Inspection Tool within Google Search Console. The feature has been disabled “in order to make some infrastructure changes.” Google said the feature should be back in some few weeks.

The annoucement was done on twitter as shown below

See tweets and read more on https://longtechy..com/2020/10/google-search-console-temporarily.html