Ironic that none of the table examples render properly on my phone…
This does seem fairly cutting-edge since I cannot even find font-variant-numeric in caniuse search - there’s some discussion about it on github.
It’s disappointing to have found this and thought “Cool! This will be useful!” and then discovering it’s poorly-supported.
On iPhone, all the table cells are rendered in a vertical list.
Controlling the appearance of old-school table elements is just so hard it’s not worth it, unless you’re specifying the size of absolutely everything in pixels.