The object that the Ensure Funds Apex Flow action looks for when resolving Invoice balances associated with an Order Summary is Order Payment Summaries. Thisobject represents the payments made for an order, and it has a lookup relationship to both Invoice and Order Summary objects. The Ensure Funds Apex Flow action uses this object to calculate the balance due for each Invoice and update its status accordingly. Verified References: https://help.salesforce.com/s/articleView?id=sf.order_management_order_payment_summary.htm &type=5https://hel p.salesforce.com/s/articleView?id=sf.flow_ref_elements_om_actions_ensure_funds_async.htm&type=5