According to the article the Humboldt gets about €1 million per year, I checked 10+ publications from this year [0] but I couldn't find a single one funded with Google money. Now, this doesn't mean that something fishy is going on but it would be interesting to find the research that Google did fund since it doesn't seem like the funds were used for regular research.

[0] https://www.hiig.de/en/publications/