React Vite: Exports from local modules not found (Migration from CRA) - node.js

Question

I am trying to import exported members from local nodejs packages. These worked fine before using Vite (standard CRA webpack setup), but ever since switching to Vite, I am getting the following error:
Uncaught SyntaxError:
The requested module '/#fs/Users/...{long_path}.../lib/shared/countries/build/index.js'
does not provide an export named 'countryListAllIsoData'
The Vite project was setup using npm create vite#latest using the typescript, react, swc preset.
These failed imports only happen on local packages (none installed from the npm registery) so I am sure the issue is on my end, but I have not been able to track down what is causing it.
Question 1: How can I make these imports work?
As they did work using Webpack, I'm not quite sure why they don't work using Vite? Vite required my project to setup the project as a module (in package.json - "type": "module"). Does the way imports work in a module break my current code?
Question 2: How can I make my linter display these errors?
I am using VS Code which seems to be perfectly happy with the way the module is imported. No errors are shown and I can go to the definition of the imports without any problems (leading me to believe everything is exported correctly).
Relevant code snippets
I am importing as follows:
import { countryListAllIsoData } from "countries";
The tsconfig.json file is untouched (exactly as npm create vite#latest created). The same applies for the package.json file, except some modules were installed (e.g. the one causing this issue).
The local package causing this issue is named countries and is fairly small and simple. It has the following package.json file:
/// package.json
{
"name": "countries",
"version": "1.0.0",
"description": "",
"main": "./build/index.js",
"exports": {
".": "./build/index.js"
},
"scripts": {
"build": "tsc",
"prepare": "npm run build"
},
"keywords": [],
"author": "Bram Vanbilsen",
"license": "UNLICENSED",
"devDependencies": {
"typescript": "^4.8.4"
}
}
The tsconfig.json file:
{
"compilerOptions": {
"target": "es2016", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
"module": "commonjs", /* Specify what module code is generated. */
"moduleResolution": "nodenext", /* Specify how TypeScript looks up a file from a given module specifier. */
"declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
"declarationMap": true, /* Create sourcemaps for d.ts files. */
"outDir": "./build", /* Specify an output folder for all emitted files. */
"esModuleInterop": true, /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
"forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */
"strict": true, /* Enable all strict type-checking options. */
"skipLibCheck": true /* Skip type checking all .d.ts files. */
}
}
The index.ts file:
export const countryListAllIsoData = [...] as const;