Should one treat commutative diagrams as figures within the
figure environment? If not, is there a way to add a label/caption and have the page number and caption show in the Table of Figures (without the
If there aren't many of the diagrams, it's better to just use
If you treat them like figures (caption, entry in list of figures) you could also use a figure environment, that would just be consistent.
Regarding the placement, you still can customize it by options to the figure (some of
If you don't want them to float, you can use for example a minipage and the
Here a minipage is good for keeping caption and diagram together without a page break between.