Edmondson, Jerold A.; Esling, John H.; Shaoni, Li. Jianchuan Bai. 2020.
/ꭒ/ "may be realized as a syllabic [v̩], as an approximant [ʋ͡ʊ] with raised-back vowel quality especially in nasal contexts, or as a syllabic nasal, e.g. as [ɱ] especially when the rhyme is nasal with no consonant onset, or as [ŋ] when the initial consonant is nasal".
The rising diphthongs are interpreted here as /j w/+V sequences. /w/ is not given in the source inventory.
Vowel reduction to schwa exists under certain conditions, specifically "in the second syllable of words where that syllable bears a particle relationship to the first syllable".