With some delay, the main ghcup metadata has now been updated: Hls 2.8.0.0 proper by hasufell · Pull Request #215 · haskell/ghcup-metadata · GitHub
This also means this release is now available automatically in VSCode.
GHCup provides its own HLS bindists, which you can also manually download here (including FreeBSD): Index of /ghcup/unofficial-bindists/haskell-language-server/2.8.0.0/