Unlike Consumption Logic Apps, Standard Logic Apps are App Service–based, so the workflow definitions are stored as JSON files inside the app’s file system.

From Azure Portal

Go to your Logic App Standard resource.

In the Automation blade, you may only see an ARM template for the hosting app, not the workflows.

For workflow definitions (workflow.json), you’ll need to download from Kudu. (I tried Az CLI, but not that supportive for standard )

From Kudu - (In Logic App Std -> Left menu -> Development Tools -> Advanced Tools -> click Go.)

Once Kudu opens:

Click Debug Console → CMD

Navigate to /site/wwwroot/ → you’ll find folders for each workflow.

Download the workflow.json file for pcflow001.

Try to save using VS 2019 (I prefer VS code).