Sure, any of my ePUBs has it. Try
The Picture of Dorian Gray, for instance.
It has an external (off-line) TOC, in the toc.ncx file, and it has an in-line TOC too in Contents.xhtml. In the <spine> element of the OPF file, Contents.xhtml is defined as linear="no", so Calibre will not show this in-line TOC when paging forward or backward through the book, but Calibre can read the TOC from the toc.ncx file.
Other readers may not support the external TOC (and I hope they will then ignore the linear="no"). Yet other readers (like ADE) do support the external TOC and ignore the linear="no", so you actually get the two TOCs there.