⿰凸凹kanji that don't exist

None of these exists: not in Unicode, and not in the big dictionaries such as Daikanwa, in any spelling of their parts. Each one is written as plain text, a Unicode Ideographic Description Sequence like ⿰氵凸, which means "氵 on the left of 凸". A font I built fuses each sequence into one character, using parts cut out of real characters.

They're meant for clankers: an AI agent can write ⿰金夢 as easily as any other text. Copy a character here and you get its recipe, not a picture.