This blog will tell you how to resolve the “Custom Business Process Flow is not showing in model-driven app”.
summary:
We had created the custom Business Process Flow on the custom RFQ entity which was not visible in the Model-driven app.
To make it visible in a model-driven app, we need to add that business process flow to the app.

To solve this drawback, follow the steps given below:
- Select your model-driven app –> Click on additional commands (…) –> Edit.

- Go to Business Process Flows select and add your business process flow within the app.

- Save and publish your app.

- Your Business Process Flow will be visible at present.
