The following guidance is primarily for child aged players. I do not as of yet have guidance for adult players.
This applies primarily with regard to other children at the table that interact with a child that has this accommodation need, however it is important to address in order to preserve the emotional needs of the child. Often if children react negatively or mockingly to a child that displays these symptoms, it could create additional factors like anxiety or a depressive state.
The first step is being aware that these symptoms may occur and discussing with the guardian/caregiver what actions are typically taken that are not seen as objectionable to the child. If those accommodations can be met then pursue them.
It is also important to communicate in advance with the other children (and their parents/guardians) at the gaming table. In discussing the needs of children with disabilities, focus on the concept that each child has unique characteristics, and while the disability and symptoms exhibited is one of them, it does not make up the whole of who they are. If it’s possible for the other children to meet with the child’s caregiver, it may allow for questions to come up that may not have been asked, or may have otherwise unfortunately come up during the session. While playing, encourage the idea that the children are a part of a team, and that as teammates, it is one of the greatest goals of a hero to be supportive of each other.