I suggest this might depend very much on where you are in the world…
As an example here in Merseyside, UK i run a Local Environmental Records Centre who’s function it is to collate information on species and habitat, standardise it and make it available for a range of purposes but including things like strategic planning and development control. So we include Citizen Science observations which are then used to advise development and local conservation.
However, there are a range of issues; other places in the UK may have records centre but that centre may not access iNaturalist observations or the local planning authority may not make use of the records centre or the developer may not make use of the records centre.
You must also be careful as by default iNaturalist observations are licenced as CC-BY-NC (and very few people check or change it) this applies to the end use so prevents a developer or any commercial user cannot make use of the observation (nor can those observations be shared to a commercial user e.g. we could not report a rare species to a developer if the observation was from iNaturalist. Similarly a planning authority could not use an observation in that way).