I just checked, it's embedding the Google Ads tag so you are right. I probably just didn't see it because I'm using NextDNS, forgot about that. Google does not just inject ads without the page owner setting it up.
For many years I didn't use any ADS on that blog. From some time I am using Google ADS and I don't make millions, however, the profits from these ads, although small, cover server maintenance costs and pay off the time spent on writing. I was convinced that everyone uses blockers and only bots make me profitable ;) If there are more negative comments about the ads, I will opt out of them.