"Conservatives" are not getting censored. Extreme far right and moderately left-Democratic to far-left voices are. Methodology for testing this is based on vague labels and a lot of reports on the trend seem to ignore Google's statements by Ben Gomes which openly admit to the political censorship policy using the terms "fake news" and "authoritative sources".
https://blog.google/products/search/our ... ts-search/
Leftist/antiwar sites like WSWS, Antiwar.com, Black Agenda Report, AlterNet, Democracy Now!, Common Dreams, and Truthout all had their Google search traffic decimated, cut in half or worse by this policy of deliberate search result demotion.