Adding react-wp-scripts to existing CRA + Expo project

[Ririshi]

I am working on a pretty complex project that combines React and React native, as we ship a smartphone app and a web app with the same underlying structure. The web app is implemented as a plugin for a Wordpress website. The project was initially set up using create-react-app and expo.

I would love to be able to speed up our dev progress for the webapp, as building and copying the build over into a local Wordpress environment is tedious and slow. But, I am not entirely sure how to integrate react-wp-scripts into our current setup. Could someone perhaps provide advice on how to use this package with an existing project?

When trying to set up a dummy project to see how it would work, I got this error after yarn installed dependencies (I replaced the real path with <project_path>):

Could not locate supplied template: <project_path>/cra-template
React WP Scripts loader could not be copied to your root folder. Error details:
Error: ENOENT: no such file or directory, open '<project_path>/src/index.js'

Running npx create-react-app --version gives me 4.0.3, is this project not compatible with versions above CRA v2?

Hoping to get a bit of clarification :)