It is impossible to answer this question in its current state.  Autism comes in many different forms, and there is no singular answer as to "how to better accommodate autistic adults".  You need to work with an individual you're wanting to accommodate and work on steps to address situations that they find stressful.  There is no "one size fits all" solution.

Some individuals may need to have primarily written communication to mitigate stress from face to face communication.  Other individuals may not be able to work productively in crowded or noisy environments and need some isolation or noise cancellation to mitigate audio distractions.  Others might need to be away from windows to mitigate visual distractions.  Others may need chairs made of specific materials to mitigate a negative tactile response.  Others may need to have a clearly defined list of tasks or a narrow job scope to mitigate stress of the unknown.

You'll need to narrow down what types of behaviors you want to accommodate and address that specific behavior.