I am sorry to lead the discussion further away from the specific title and more into the general aspects of ‘life stage’ annotation, but I feel the need to answer here.
On the taxa pages, iNat has built in these wonderful phenology diagrams, with ‘life stages’ in insects indicating when, during the year, the different stages occur. These graphs are fed by the annotations given on specific observations. As the intrinsic meaning of these graphs refers to living individuals found at that time, annotating traces of living organisms (such as leaf mines without the insect still in there) would impact those graphs in an unintended way.
So whenever I find on, say, an uncleaned window sill a dead moth in winter (without evidence of it being alive shortly before), or a mantis ootheca in autumn or empty exuviae from cicadas or dragonflies, I refrain from annotating them. Yes, they indicate a certain life form was there, but not at the time of observation.
Would be great to annotate them still, with a toggle to opt-out of contributing to the phenology, but this is a rather niche request, I’d say