Google does not index new pages

Since the beginning of October, Google has not indexed new pages for me. I am affected by 3 sites, hosted on different servers, placed in 3 different Google Search Console accounts.

Websites are old and rank well in Google. Pages already indexed are often visited by Google crawlers and updated without problems.

In the Google Search console, if I check the new pages, the message "URL is unknown to Google" is displayed.

I tried to manually ask for indexing for each of the pages, but it didn't help.

If I do a live test of the URL, no problem occurs. I get the message that the page can be indexed.

In the meantime, the content on some of the pages was stolen from me by the competition and their pages were indexed quickly.

In the past, my pages were indexed in a maximum of 48 hours, without the need to use the Google Search Console.

Does anyone else have problems like this?