If macOS shows the «no installable fonts selected» message while trying to manually install an encrypted iOS font package then it's due to a permissive security policy. As a result Font Book fails to decrypt the fonts contained in the TTC archive in order to copy them in the /Library/Fonts folder.
Everyone can install the online version of PingFang through the Downloadables section of the app.
Topic:
Graphics & Games
SubTopic:
General
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