This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
脼 combines the flesh component ⺼ with 兩, which likely contributes the sound. The exact historical development and original meaning are uncertain.
The left side ⺼ suggests flesh or body, and the right side 兩 resembles a pair of scales. Picture a body part being weighed, but its exact meaning remains unclear.
For リョウ, imagine a rare body part named 'ryou' that only appears in ancient texts: ryou -> リョウ, and the flesh component ⺼ hints at its bodily nature.