Most all auto generated text is created in the stylesheet, so if one cannot change the stylesheet, then it is unlikely that generated text content can be changed.
Thus footnotes and endnotes cannot be changed.
Also how do you propose that a endnote look like a footnote?
Do you have an example?
Footnotes are styled by the stylesheet to be placed on the same pages as its reference, where endnotes are styled to be scoped to the end tag of some element, like a <chapter>, <part>, <section>, etc.
