question about major brand of CMAF content

[fearlexs]

I think cmaf stream should have major brand “cmf2” or “cmfc” in mp4 “ftyp” box and the suffix should be cmfa, cmfv or cmft The following test cases do not match the above description

• https://media.axprod.net/TestVectors/v9-MultiFormat/Encrypted_Cbcs/Manifest.mpd

Please help me to check whether my understanding is wrong or the test case itself is biased