Access my web app with CNAME
The most likely issue is that you don't have a web app at the domain that you're trying to access. For instance, if you've added the CNAME to www.mydomain.com, you must have a web app at www.mydomain.com. The fact that you're getting a "coming soon" page suggests that the CNAME is correctly set up to go to PythonAnywhere.
I have an app deployed on pythonanywhere and setup to use a custom domain. I'm in the process of getting the domain and I wanted to ask if there is a way to access my application via the CNAME webapp-xxxxxx.pythonanywhere.com which has been provided by pythonanywhere. Currently trying to access it takes me to the coming soon page.
Thank you.