How do you get custom Cognito Attributes into Amplify Back-End?

We are trying to deploy a new site and ran into an issue that has been keeping us from moving forward.

We have recently upgraded our site from Vue2 to Vue3 and are re-deploying it using Cognito for authentication and Amplify for our site hosting and back-end. In the older version of Amplify, you could define the fields coming in from Cognito, but in the newer version, it automatically generates a aws-exports.js file that does not include the custom attributes from cognito. (It does include all the other settings from our UserPool, but not the custom attributes.)

Anyone know how to get these custom attributes over into Amplify? I assume it has something to do with the automatically generated cloud formation templates, but I could not figure it out.