Hi, Unfortunately no, you can't link to One Notes pages from within Aeon Timeline Jess
Yes you can easily do so by copy the section or page link in Onenote and and past it in as a Link in "Links" Then if you click on the "Open Document", it will open Onenote and take you to the correct page or section. If Onenote is closed, it will open Onenote and take you to the correct page/section, if Onenote is open, it will just take you directly to the target. At least it works well with Onenote 2016 desktop version on Windows 10.
It also work for links to online documents. In your online Onenote, right click on the document in the document panel and click on "Copy link to this document" Then paste it in as a link under "Links" in Aeon Timeline. This linking works in any text field or link field that accept internet links or URI's.