Knative is part of the CNCF projects participating this year; applications open on April 4th.
If you are thinking about applying is good to post comments and questions on the GitHub ideas discussions, so the mentors get to know you and your interest before you apply.
Check out the blog post we released today by Ali Ok about this topic:
https://knative.dev/blog/articles/google-summer-of-code-2022/
I'm having a Twitter Space tomorrow if you want to join and talk about GSOC and CNCF Projects:
https://twitter.com/csantanapr/status/1509607399514071040