

Sorry for the stupid question, but what would an “operating system provider” mean here? Does that mean “the organization that builds and distributes the operating system”? If so, Linux is sort of screwed in CO; even The Linux Foundation can’t act for Linux the same way Apple or Microsoft can for macOS or Windows respectively. Maybe Red Hat could, but only for their flagship distro RHEL, and the E stands for Enterprise, lest we forget.
If “operating system provider” were interpreted to mean “system administrator”, however (which is a stretch, but still), that might be a decent solution, since it has the effect of age-limiting content in an enforceable way, but keeps identity information from being centralized under a government or (single) private agency. The sysadmin for children would be parents, who are the only ones who would be providing the hardware, and that could work, especially if there was only the child’s account on the device (like a cell phone).
I dunno if the above is horribly ignorant; if so, I’m open to being more educated on the topic.

Ah, I found the official answer to my question in the definitions (definition 9):
This still leaves room for ambiguity, though, especially when it comes to Linux: is the OSP the person who installs the OS (e.g. a sysadmin)? They control the operating system on that device. Or are they the individual/organization that deems what software counts as a given operating system (e.g. Microsoft or Linus)? They develop and license the operating system that happens to be on a given device. Maybe it’s both, but the context suggests the latter more strongly to me.