Would be fine, if I knew how to get there.

I cannot see anything labeled "tools", neither here nor when going to "History" first.

Maybe it's because of my notorious banner-blindness, or because I'm missing some privileges.

watchmaker‭, I've updated the answer. ¹ Does it now sufficiently elaborate? ² I was somewhat cryptic in my original phrasal, especially without accompanying examples.

To summarise, you need to access “History” (tools--item), then expand the desired revision, or utilise “Copy Link” (/history with #1 or #permalink-294866-1, as one example). ⁴

1. /history#4 ↩

2. posts/294879/history#1 ³ ↩

3. posts/294863/history#2 ↩

4. posts/294878/history#1 ↩

Now "It works for me", switching to "History" (as expected) then "Copy link" (showing options "raw" and "markdown"), choosing "markdown" and then, in my browser, going to that link shows me exactly what I wanted to see.

Well, having another try on https://math.codidact.com/posts/294748/history#2 I don't see how the fractions and symbols are made (of course I know for this special case as I did it myself, but if the code originated from someone else, I still couldn't see).

Looks like there are really more than two layers involved.

I've combined the problems raised in this thread into an answer in favour of the feature request.