PO approval for inventory notification not working after 25C upgrade

Summary:

After the recent 25C upgrade, our Purchase Order (PO) approval notifications have reverted to the classic UI instead of the Redwood UI. We attempted to resolve this by following the steps in Note# KB184670. While this successfully fixed the issue for Project and Expense PO approval notifications, the notifications for Inventory POs are still appearing in the old (classic) UI.

We have followed the steps provided by following community discussion:

Purchase Order Approval notification layout changes on 25C — Cloud Customer Connect

The suggestion resolved the issue for expense and project approval notification but not for inventory. Upon further research we found that issue for data model.