The above sign was spotted in a roadside rest area in restroom, maintained by the state of Wisconsin.
Other public places could do the same.
This may be a response to a 2016 ruling a woman’s chemical sensitivity was a disability under the American’s with Disabilities Act (ADA) because it interfered with the major life activity of breathing.
The link in the above paragraph outlines accommodations employers may need to make in the workplace for those with fragrance allergies, which go so far as to ask or require other employees to abstain from wearing or using scented products.
I remember when smoking cigarettes was first banned in public places and now it is widespread. So I am optimistic the same will happen with fragrance.