On the FreeBSD Download page: https://www.freebsd.org/where/
It does not list 13-STABLE snapshots, only (11/12)-STABLE and 14-CURRENT. We should list 13-STABLE as well.
I support this.
I was looking for 13-STABLE and it's lucky for me that I kept the 13-STABLE mail announcement which contains links. Should be easy to find on the download page as well.
We now list 13.0-RELEASE betas, but still not 13-STABLE snapshots.