Here are several links to visual supports for prayers, high holidays and shabbat:
Here is a guide from Gateways on inclusive Shabbat worship
Matan offers PECS for High Holiday Prayers
RespectAbility offers RespectAbility-Synagogue-High-Holiday-Toolkit-2019 (2) for inclusive worship and also offers step by step instruction for worship organizations seeking to be more inclusive.
The Ruderman Foundation Supports a wide variety of inclusion programs, including Gateways. Here is a link to Gateways High Holiday resources
From Longing to Belonging – Including People with Disabilities & Mental Health Conditions