Google is excelling again - as the whole “uncensored” Big-Tech IT now.
The short summary is that for nearly a year, Google was hiding Proton Mail from search results for queries such as ‘secure email’ and ‘encrypted email’. This was highly suspicious because Proton Mail has long been the world’s largest encrypted email provider.
There is nice tutorial here - simple steps how to get rid of the Google on Android Phone: https://www.jumagazin.cz/How-to-protect-your-self-on-Internet-part-II_468.html