Google doesn’t promote 8.8.x.x lately, so when there were some sites being blocked by Indian ISPs, I saw cloudflare DNS being recommended. Also I believe cloudflare doesn’t implement ban-lists provided by Indian courts. I have noticed sites blocked in google dns, working with cloudflare dns.
To extend this, I’ve never seen google promote 8.8 publicly. All recommendations I’ve seen have been from other users or forum members. It maybe that Google’s trust isn’t what it once was, causing a reduction in recommendation.