A developer needs to debug a flow tracing a single input in complete detail, watching...

To debug a flow with detailed tracing of a single input, including watching all variable changes as the checkout process is executed, the developer should enable "Show execution details" (inline) within theFlow Debugger. This feature allows developers to see a step-by-step execution of the flow, including the values of variables at each step. This is crucial for understanding how data is being passed through the flow and for identifying any issues. Salesforce documentation on debugging flows provides more information on this feature:Salesforce Flow Debugging Documentation.