The Update Client Details app has the functionality to delete intermediate records after approval. If you want to keep the intermediate records even after approval, you need to enable this feature in your org. To enable or disable this feature in your org, please reach out to us @ucd@satrangtech.com.
Note - This feature comes with paid version only.
P.S. Discover Update Client Details, the easy way to keep client information up to date in Salesforce. Find it on AppExchange - https://appexchange.salesforce.com/appxListingDetail?listingId=a0N3A00000EcsATUAZ