There are a variety of observation fields that are directly linked to annotations. You can enter the fields during upload and the annotations will automatically populate. One benefit of this is that fields can be downloaded, as annotations can’t (hopefully, that will change, but that is the current status).
Examples are
Insect Life Stage
https://www.inaturalist.org/observation_fields/325
and a whole batch that apply to Alive/Dead from Let’s talk annotations thread
There may be others but those are the ones I am familiar with.