https://blog.cloudflare.com/popular-domains-year-in-review-2021/

10 — Most popular domains (late) 2021
1 TikTok.com
2 Google.com
3 Facebook.com
4 Microsoft.com
5 Apple.com
6 Amazon.com
7 Netflix.com
8 YouTube.com
9 Twitter.com
10 WhatsApp.com

Top 10 — Most popular domains (late) 2020
1 Google.com
2 Facebook.com
3 Microsoft.com
4 Apple.com
5 Netflix.com*
6 Amazon.com
7 TikTok.com
8 YouTube.com
9 Instagram.com *
10 Twitter.com

Tik Tok at #1 is a surprise, but I'm just as surprised that Twitter moved up a notch and Insta dropped out of the top 10. Assuming it is now #11, that still leaves three Facebook Meta properties in the top 11. As a company, they must still have the most traffic.