As described by the process
https://github.com/nodejs/node/blob/6a3b545b4da83cf54b82bdb89cd3ad8b2aec6fe7/doc/contributing/security-release-process.md?plain=1#L11-L17

A nomination in the TSC repo is required, I'm not sure if self nomination is allowed (there is just 1 occurrence of nomination #1233)

It's not even clear how long this issue should be open before nodejs/node#58944 can be merged