Hi,
Please use below query, this will display all dashboards in all apps (If you have admin access).
| rest /servicesNS/-/-/data/ui/views
| rename "eai:acl.perms.read" as read_permission, "eai:acl.perms.write" as write_permission, "eai:acl.sharing" as sharing, "eai:acl.app" as app
| table app, title, read_permission, write_permission, sharing
EDIT: To check read access for specific role, please try below query (In below query replace <role_name> with actual role name.
| rest /servicesNS/-/-/data/ui/views
| rename "eai:acl.perms.read" as read_permission, "eai:acl.perms.write" as write_permission, "eai:acl.sharing" as sharing, "eai:acl.app" as app
| mvexpand read_permission
| search read_permission=<role_name>
| table app, title, read_permission, write_permission, sharing
