Well, I was using the Hylang downloaded from homebrew, so it comes pre-packaged with python3.12. It was a little annoying having to figure out the exact path of that executable to install Hyrule and the Flask packages, but it was smooth sailing once I figured that out.
Edit: `/opt/homebrew/Cellar/hy/0.28.0/libexec/bin/python3 -m pip install hyrule`, in case anyone else needs it. ;)
For my editor, I use Emacs with the usual Spacemacs packages. I think Spacemacs either comes with a Hylang mode, or I downloaded it from Melpa. I can't remember off the top of my head. But I could look that up if needed.
Edit: Looks like I added hy-mode to my dotspacemacs-additional-packages.