匐 is a Chinese hanzi, listed here under the keyword “fall prostrate”. It is built from 勹 (wrap) and 畐 (to fill). It appears as a component in 1 other character in this index.
On KumiJi Glyph Explorer, open the parts search and type “wrap” + “to fill”. 匐 is among the results, together with every other character containing the same shapes.
Open 匐 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.