In some sense, you can still do! The Ideographic Variation Database [1] essentially allows a definition of new CJK ideograph [sic] as a glyphic subset of existi

In some sense, you can still do! The Ideographic Variation Database [1] essentially allows a definition of new CJK ideograph [sic] as a glyphic subset of existing characters, with a possible processing fee. [1] https://unicode.org/ivd/ https://unicode.org/ivd/