Yesterday I heard a Joe Rogan guest mention a particular non-Rogan podcast episode. It was a discussion about science and policy by two professional, well credentialed scientists and a layperson. I Googled it, couldn't find it. Same for Bing and DDG. Turns out it had been a popular YouTube video, but they objected to the conclusions and de-platformed it, from YouTube and the big indexes.
It took maybe another dozen clicks to find it on one of the participant's own blog. And the podcast is still up and hosted by Apple. So it's something that you can find if you know about it, but not by searching on the topic. At this point, at least, the shadow ban is still soft.
Add that as a data point for Google no longer producing high quality search results.