Thank you for your question.
I can confirm that all of the functions apart from the Enhanced Search page are limited to JIRA Administrators inside of ScriptRunner for Jira Cloud as you can only access them from the Add on's administration page or when editing a workflow which only JIRA administrators can access.
Unfortunately, this means that it is not possible to allow certain users who are not admins to access any of the features which you allow to run scripts as these are restricted to Administrators only as running scripts can cause actions which can modify the Jira instance or issue data and this why only administrators are allowed to do this.
This means the only way to allow users to run scripts will be to grant them administration access inside of your instance.
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