Ok, a little update, not too important but strange.
I now downloaded the Tinos font and found that (according to FontForge) it does not actually contain a reversed pilcrow glyph.
The samples I sent I prepared as HTML with CSS according to the Google Fonts API. I went to great lengths to avoid replacement characters to be shown, which browsers apparently incessantly do. Concretely, I additionally embedded the special "AdobeBlank" font which contains all Unicode code points, but with a blank glyph for them, and then I had code like this,
<p class="sample" style="font-family: Tinos, AdobeBlank">⁋</p>
to ensure that if the font does not contain the reversed pilcrow, nothing is shown. That seems to have worked for most fonts, but not for Tinos. There must be some special witchery at work. ;)
Anyway, that reduces the set of true & jgm-approved reversed pilcrows to one, Vollkorn.
For the fun of it, attached what it looks like if one uses the reversed pilcrow as if it was a P.