Thank you for bringing back this case/issue to the "table", @Larske!
It seems that the manifestation of this unauthentic behavior has vanished in Buglarian Wikipedia as the article for Puigdemont in Bulgarian finished in 13th place in 2023 but is nowhere to be seen in the last three months in the monthly top 100 most-viewed articles charts. It was on #35 in January 2024.
And, as you can see following the link, mobile views represent only 0.1%
I hope this case will lead to some engineering breakthrough because once a vulnerability in automated detection is exploited in such a way, the probability that it will not happen again and that no one else will reproduce the manipulation seems to me to be very unlikely.

In T263908#8341166, @jhsoby wrote:

@JArguello-WMF: Any update? :)

In T263908#8202507, @OwenBlacker wrote:

Thank you @Pelajanela; I have added screenshots for cywiki (Welsh)

I started a Google doc with pageviews data and stats from more than 20 WP language versions that you can access here. Please, feel free to contribute.

In T316743#8202128, @Aklapper wrote:

Hi @Pelajanela, thanks for taking the time to report this and welcome to Wikimedia Phabricator!
This has been already reported, so I'm going to merge this task.