I originally put the information in the AdwActionRow's subtitle, but then the important part (in the subtitle) becomes a dim label, which seems wrong.

I also tried an AdwEntryRow instead, which makes the title dim instead, but then you get a weird semi-editable appearance, such as the pencil icon, even when the field is not editable.
So this appearance with a label on the right is similar to the Information section of the General tab in the GTK Inspector.
I also re-arranged the order slightly; it seems like the Meson arguments are the least important so I put them last.

Compiled and opened About dialog.