This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 捛 is uncertain. It visually combines 扌 (hand) with 吕, but the original semantic or phonetic role of these components is unclear.
With no clear meaning, picture a hand 扌 holding a pair of mouths 吕, perhaps trying to communicate something unknown.
For リョ, imagine a hand 扌 holding a 吕-shaped object while someone says 'ryo' (リョ) as a made-up sound for the action.