Maybe you should direct this question to the Shelly developers:
As Shelly is no CachyOS Distribution product 
I know, it can be confusing but thats how it is on Linux, that somethings are available as default in a Linux Distribution does not necessarily mean (in most cases) the distribution maintainers are responsible for the app development of included app.
Having written that, I guess the Shelly team, as most developers, will value your feedback but it does not make sense to give feedback about bread at a butcher ,)
Cheers
das_ICH