Inoreader, a similar service, was banned from Apple's Chinese App Store back in 2017. Feedly is also unavailable through the local App Store.
The history of China's crackdown on RSS dates back to 2007 when the authority launched a blanket ban on web-based RSS feed aggregators. [...]
[Reeder developer] Rizzi said he had tried reaching out to Apple, "not because I have any hopes to get Reeder 4 back into the store but more to get some clarification." Apple encouraged the developer to reach out to the Cyberspace Administration of China directly.
Reeder and Fiery Feeds said this week that their iOS apps have been removed in China over content deemed "illegal".