蓋 is a traditional Chinese hanzi, listed here under the keyword “cover”. It is built from 艹 (grass) and 盍 (what? why not?). It appears as a component in 6 other characters in this index.
On KumiJi Glyph Explorer, open the parts search and type “grass” + “what? why not?”. 蓋 is among the results, together with every other character containing the same shapes.
Open 蓋 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.