How to do delete outline prefix number

[Andrew]

With the new helper functions, you can just skip it.prefix():

#show outline.entry: it => {
  link(it.element.location(), it.indented(none, it.inner()))
}

Also, #outline(title: "") is not the same as #outline(title: none). If you don’t need title, then use none, otherwise it will be present with no text. You can also use set text(lang: "zh") many things to be localized to Chinese.

Outline Function – Typst Documentation

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If you need to remove just top-level numbers:

#show outline.entry: it => {
  let prefix = if it.element.func() != heading or it.element.level != 1 {
    it.prefix()
  }
  link(it.element.location(), it.indented(prefix, it.inner()))
}