So I was interested to dig more into this..., but I wasn't able to find any other source that talked about this. Furthermore, while some digging suggests that the author is a real person, the text didn't score well on https://undetectable.ai/ . Do with that whatever you will*
FWIW, trying to install it within a distrobox container gave the following error:
error: target not found: rye-init
Which, AFAIK, suggests that the package is not found in the repo. Nor does going through https://archlinux.org/packages/ yield any results. At this point, my best best would be to spin up a VM and see if that makes a difference. But I'm not really in the mood at the moment.
Regardless, has somebody checked the package out for themselves? Or, have they seen discussions on it elsewhere?