@AlexD619Do you mean that you have an embedded data list that you use in your case or that you managed to add a list view from a data object "stright up" into the case? Depending on which the answer will be different:

• In case of embedded data: I would recommend to update to Pega '25. In '25, there is the option to use an action instead of a view for adding rows to your embedded list. That way, you now have preprocessing you can run when you add a row.
• In case of list view directly showing all records like a landing page: I wouldn't do this. I know it's possible to "get it in there" on a case, but list views and insights are intended for landing pages and places outside a case context. I would suggest to handle your data updates with an embedded list in the case first, and then perist the updates at a specific point in the case. That way, you don't mix the concepts of data record updates and case level data entry.