Hi
Thank you for your question.
At the moment, Portal does not provide a configuration option to hide or disable role-based absence substitution for specific user roles. The absence substitution settings are applied globally and are available to all users.
I understand that in setups like yours where Service Advisors only work with personally assigned tasks, the role-based substitution option may not be relevant and can cause confusion.
I will forward your feedback to our team for evaluation. However, at this time we cannot confirm whether this capability will be supported in a future release.
Thank you for bringing this to our attention. Please let us know if you have any further questions or use cases to share.