According to this website https://github.com/BryanLunduke/DoesItAgeVerify
System76 also planned to implement age verification should the law pass. They did not claim that they'll relocate or re-register their company legally, or request their users upon installation to not use the OS in California/Colorado, or anything like that actually.
I think that's noteworthy. I personally consider it half a fight. Like, you create noise, but if boss says it's OK, you say "OK, you're the boss after all".