Building/.work/bold-test6.typ

#set text(font: "Times New Roman", size: 12pt)
#show table: it => {
  let fields = it.fields
  let children = fields.remove("children")
  table(..fields, ..children.map(c => {
    if type(c) == content and c.func() == table.header {
      table.header(..c.children.map(h => {
        if type(h) == content and h.func() == table.cell {
          let f = h.fields
          let b = f.remove("body")
          table.cell(..f, strong(b))
        } else { strong(h) }
      }))
    } else { c }
  }))
}
#table(
  columns: 3,
  table.header([Aaa], table.cell(colspan: 2)[Ccc], []),
  [ccc], [ddd], [eee],
)