Hidden disabilities sunflower
From ActuallyAutistic Wiki
The sunflower is a symbol for invisible disabilities and hidden disabilities, such as autism, and is recognized globally. People can wear a sunflower lanyard, badge, patch, cap, key chain, face mask or other accessory to discreetly indicate that they have an invisible or hidden disability. The card can be customized and contain additional information. For example: it may specify that the holder is autistic and has situational mutism. For more information, see Hidden Disabilities.