<span style="color:#323232;">comment body here[^1]
</span><span style="color:#323232;">
</span><span style="color:#323232;">[^1]: and the footnote at the very bottom of the comment
</span>
or the easy to write type
<span style="color:#323232;">comment body here^[and the inline footnote]
</span>
(note the different locations for the caret)
keep in mind that they don’t work on most apps, and some frontends