Here are several links to visual supports for prayers, high holidays and shabbat:
Beit Issie offers IssieRoots Activities for Rosh Hasanah and Yom Kippur which includes cards, holiday worship and lesson plans.
Matan offers this resource library of curricula of Jewish discussions of disability and inclusion organized by age group. Simply sign in with your email address for access to the materials.
Here is a guide from Gateways on inclusive Shabbat worship
RespectAbility offers several resources for High Holidays, the most recent is:
Please see their previous tool kit for other useful tips RespectAbility-Synagogue-High-Holiday-Toolkit for inclusive worship and also offers step by step instruction for worship organizations seeking to be more inclusive.