Auto population of Custom Fields in Resignation Page

The customer has requested several custom fields (like Recovery Days and Actual Working Days) to be auto-populated on the Resignation Page based on the resignation date entered by the employee. I’ve initiated an auto-complete rule that has been approved. However, I’m concerned about its feasibility once we transition to Redwood, as I understand that auto-complete rules won’t function in that environment. Could you share your thoughts on this? Whether we have any other approach for this in Redwood page?