for folks who don’t want to wait for staff to do whatever they do to allow a particular place to show up, it’s possible to add places to a collection project via the API. this describes one workflow to add taxa to a collection project: https://forum.inaturalist.org/t/moving-a-list-to-a-project/64938/2. to add a place instead of taxa, just adapt step #4 to use an appropriate rule definition for your place.
start by finding the numeric ID of your place. one way to do this is to go to the place page in the iNat website, add .json to the URL, and then navigate to that. for example, if your place page is https://www.inaturalist.org/places/washington-county-mo-us, then you would look for the numeric value assigned to the id field in https://www.inaturalist.org/places/washington-county-mo-us.json.
then look to see if you have any places already defined in your project. if you don’t have any places already in your project, then you would use this rule definition in step #4, replacing 0 with whatever the numeric ID of your place is:
source_rules['place']['include']['ids'] = [0]
if you already have places defined in your project and wish to preserve them while adding your new place, then use this rule definition instead, replacing 0 with whatever the numeric ID of your place is:
source_rules['place']['include']['ids'] = await get_project_rules_operand_ids(project_id, operand_type=source_rules['place']['operand_type'], operator=source_rules['place']['include']['operator'])
source_rules['place']['include']['ids'].append(0)