It would probably have to be a new Feature Request, unless there is some undocumented URL functionality on https://www.inaturalist.org/observation_fields that someone can enlighten us about.
Doesn’t directly address this need, but it’s also worth a read through
https://forum.inaturalist.org/t/standardize-and-clean-up-observation-fields/363
for some past requests and current staff position involving fields.