There is this closed issue on CRA repository, so you probably can easily migrate from node-sass to Dart Sass just running a few commands.
First of all check your yarn.lock or package-lock.json to know if the version of the sass-loader that your react-scripts depends on is 7.2.0 or later.
If so, all that you need is run the following commands:
yarn remove node-sass
yarn add sass
In my case after that I had to remove the node_modules directory and ran the yarn install again due to an issue stating the app.
Notes:
- The
react-scriptsversion I’m using is 4.0.0 - The npm lib for Dart Sass is
sass - The use of
node-sassis deprecated since 26 October 2020