text shaping is not a thing. Unicode provides some basic parameterization (e.g., indicating where valid line breaks can occur in a text), but does not provide m

text shaping is not a thing. Unicode provides some basic parameterization (e.g., indicating where valid line breaks can occur in a text), but does not provide much more in the way of layout specification, nor should it. It’s a text encoding specification, not a typography specification. You will also notice that it does not include, e.g., specifications about Latin alphabet typographic ligatures either (e.g., f+f+i → ffi). The existence of some ligatures in the Unicode standard is a sop to backwards compatibility with older encodings only (this is also why Unicode includes superscript/subscript digits, box drawing characters and a number of inconsistencies in how different scripts are managed).