First things first: When Guix is possible to build from source on Hyperbola, there can be a PKGBUILD (including needed files) posted here for example. Creating another fork is way far more work as the naming-scheme must be fitting the packages within the repositories of Guix itself. So Ungoogled Chromium can be recognized and besides that even IceCat is for now "not free" as it is based onto Rust and the project Hyperbola rejects Rust as it has enough freedom flaws.
This is way more work incoming than creating something like Hyperguix. Creating an own package as of interest making it work, offering here for others? Yes. Needing Guix here at this distribution? Well, I have doubts about that because Hyperbola is changing towards BSD-compliant not being compliant towards Linux (without GNU) and Guix has enough freedom flaws - mentioned already here. Just because the "need for being on newer packages" I'd like to say just "No, Hyperbola doesn't need Guix then!". There are possibilities to create newer versions of packages and software already.
It is a user decision: If the user decides to run Guix? Fine then. But the distribution itself doesn't need more than one method to distribute software. There is pacman and with this reasoning back in mind flatpak was removed already: Because there are no free repositories existing for now and any repository having mixed free and proprietary licensing is just more of the known paradigm. Being strict with principles meaning being for freedom, privacy and security. Guix is mixing this and creating a method to "filter" packages is more work than just letting this package-manager out of scope. No, Hyperbola doesn't need Guix itself. If users need it, okay ... creating a package and offering here for everyone to tryout. We have the package your-freedom and creating another package for Guix including some white- and blacklist fitting is way too much. Just my point of view as user of the distribution.
Human being in favor with clear principles and so also for freedom in soft- and hardware!
Certainly anyone who has the power to make you believe absurdities has the power to make you commit injustices: For a life of every being full with peace and kindness, including diversity and freedom. Capitalism is destroying our minds, the planet itself and the universe in the end!