This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
瞱 combines 目 (eye) with 華 (splendor/flower), but the exact historical development and original meaning are uncertain. It may have originally described a way of looking or an eye-related quality, but this is speculative.
The eye 目 beside the splendid 華 suggests a gaze that is bright or showy, but since the meaning is unclear, picture an eye looking at a beautiful flower without knowing exactly what it signifies.
For ヨウ, imagine a yo-yo dangling in front of the eye: yo -> ヨウ, and the eye watches the yo-yo go up and down.
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