Official news on crawling and indexing sites for the Google index
rel=ugc can now be used in place of rel=nofollow to represent user-created links in posts and rel=sponsored can be used for links to sponsored. Both of these new attributes help Googlebot to reason about the structure of your site. You can use multiple rel attributes as-well like so: rel="ugc sponsored"
I like the newly added features but I can't quite help thinking that this is Google effectively taking ownership of SEO. Other engines like Bing and DuckDuckGo will need to implement these things if they are to stay relevant.