The whole claim comes from a single marketing guy, who did some google analytics. The German exterior intelligence BND has voiced skepticism as google analytics do not provide exact results of exact queries at specific dates and the same can be reproduced for other countries easily.
Deepl:
However, security authorities doubt the informative value of the search: the results of the trend analysis do not refer to the number of searches actually carried out in a selected region and at a selected time, but to random samples and the probabilities calculated from them. ‘The exact terms entered are not necessarily analysed, but also word stems or even just individual words in the query,’ said the BND spokesperson.
Trend analyses with search volumes that are too small result in so-called artefacts due to the algorithms, which are not designed for this type of use. ‘The supposed correlation with these artefacts and a reference to Russia can also be reproduced for numerous other countries, which makes an attribution to Russia appear less plausible,’ it said.
In addition, anonymising VPN use is not reliably taken into account by Google Trends. ‘Search queries therefore allow only limited or no conclusions to be drawn about the actual location of the user,’ said the BND spokesperson, referring to the suspected Russian connection.
Translated with DeepL.com (free version)
I strongly recommend not to rush into a conspiracy theory that was most likely sawn by a person with financial interest. We already saw where this leads to during the COVID pandemic.