I can confirm, I cannot find it either on Google News/Search, with tools.
I wonder how even is possible to index something like that. Is it obvious during index build that something is old? Is only needed to search ceuta 2021 - but it finds recent articles comparing current situation to 2021, not 2021 articles.
Maybe problem is not that it cannot search for those articles from 2021, but that articles from 2021 are gone now, or they are buried so deep it is so hard to index them.
Doing the same on Kagi and DuckDuckGo worked though. Both search engines can filter by time and find articles from the 2021 incident.
No, Google knows very well about each and every older source, it just refuses to show them.
Here, I can easily prove it: search for something like "site:theguardian.com" and set the date filter to show you results before say 1/1/2020. I guarantee you you won't find a single news article within search results. You will find other pages from their site such as tag pages or old job postings of theirs and what not, but no news article what so ever. Then swap The Guardian for whichever news source you want and do the same.
Then do the same on say DuckDuckGo and it'll work as intended.