I don't remember exactly which version introduced the multi-column footnote layout.
If you are still using Word 2013, which your profile says, then maybe you don't have that option.
You are correct, though, that no version supports displaying multiple footnotes in the same text paragraph. You can format the paragraph marks between footnotes as hidden, but doing so won't save any vertical space in the footnote area.
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Stefan Blom
Microsoft Word MVP
Microsoft 365 apps for business
Windows 11 Professional
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