Sardinian in CLDR releases

[lmelonimamo]

Hello,
Reading the CLDR 38 release note, I've noted that some languages have been added to it even while being at a Basic or Moderate level. Meanwhile, Sardinian seems to be missing even if it only needs the emoji characters to reach the Modern level. Could I ask you why is that? What should be done to add it as well?

Best regards,
Luca
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