I'm confused why this doesn't already work, since Text.get_figure() currently returns the parent figure rather than the root.

In [11]: fig = plt.figure()

In [12]: sfig = fig.subfigures()

In [13]: ax = sfig.subplots()

In [14]: txt = ax.text(0, 0, "foo")

In [15]: txt
Out[15]: Text(0, 0, 'foo')

In [16]: txt.get_figure()
Out[16]: <matplotlib.figure.SubFigure at 0x7f2eff1b6ed0>

Should figure_box be involved in this line?

Edit: and some of the lines above it. I guess when this was written figure_box.x0 and figure_box.y0 were always zero so didn't need accounting for.

I'm confused why this doesn't already work

I have just checked that the code in #28358 (comment) does not wrap - assuming it was due to the root figure, but it may well be that there is a calculation issue instead.

Titles do not have a wrapping problem... 😕

fig = plt.figure()
sfig1, sfig2 = fig.subfigures(ncols=2)
ax1, ax2 = sfig2.subplots(nrows=2)
ax2.set_title("Another title that won't fit in this amount of space", wrap=True)
sfig2.suptitle("Long title that won't fit in this amount of space", wrap=True)
plt.show()

I can confirm both that tick labels wrap incorrectly and titles wrap correctly and that the tick labels have the correct (sub) figure attached to them.

Very odd.