This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
鋿 combines 金 (metal) with 尚, which likely contributes the sound. The exact historical development is uncertain, and the character is rare.
With 金 (metal) on the left and 尚 on the right, this kanji might relate to metalwork or a specific metal object, but its meaning is not established. Picture an obscure metal tool with a shape resembling 尚.
For ショウ, imagine a metalworker showing a polished piece: show -> ショウ, and the metal 金 gleams.