no-unused-vars throwing Error rather than Warning?

Question

We recently updated several NPM packages and other parts of our React application, and now no-unused-vars is throwing an error rather than a warning.

One of the updates to our application was updating from babel-eslist to @babel/eslint-parser in our package.json (now have "@babel/eslint-parser": "^7.18.2"), and updating the parser in our .eslintrc accordingly.

// "parser": "babel-eslint", // 
"parser": "@babel/eslint-parser",

Another potentially-relevant update is that we updated react-scripts to the latest version "react-scripts": "^5.0.1". Is it possible to have no-unused-vars return warnings again, rather than errors?

We have the following rule for no-unused-vars

"rules": {
  ...
  "no-unused-vars": 2, // disallow declaration of variables that are not used in the code