you have made sure that @next/third-parties is in your package.json file and you have installed it (ie npm i)?

Yes. Component works fine but type is not found.

o.O try restarting vscode

sadly, it doesn't work.
FYI
next 13.4.4
@next/third-parties 14.0.1

tsconfig

{
  "compilerOptions": {
    "target": "es5",
    "lib": ["dom", "dom.iterable", "esnext"],
    "allowJs": true,
    "skipLibCheck": true,
    "strict": true,
    "forceConsistentCasingInFileNames": true,
    "noEmit": true,
    "esModuleInterop": true,
    "module": "esnext",
    "moduleResolution": "node",
    "resolveJsonModule": true,
    "isolatedModules": true,
    "jsx": "preserve",
    "incremental": true,
    "paths": {
      "@/*": ["./*"],
      "@root/*": ["./*"],
      "@__test__/*": ["./__test__/*"],
      "@components/*": ["./src/components/*"],
      "@pages/*": ["./src/pages/*"],
      "@common/*": ["./src/common/*"],
      "@lib/*": ["./src/lib/*"],
      "@generated/*": ["./generated/*"]
    }
  },
  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx"],
  "exclude": ["node_modules"]
}

lol why aren't you using latest nextjs version? (like they are meant to be the same version number)

That's our maintenance issue, I checked compatibility from here:
https://github.com/vercel/next.js/pull/57515

Running into the same issue here with next and next/third-parties latest version

"@next/third-parties": "^14.0.2",
"next": "^14.0.2",

Any updates on this?

Same it's a bug, you'd want to open a ticket I think

The problem is that third-parties doesn't have exported types, so only thing you can do rn is mark it with

// @ts-expect-error -- package types missing
import { GoogleTagManager } from '@next/third-parties/google';

I've got 2 projects both running Next 13. I've just installed this library in both repos today and only get this issue in 1 project. Very strange.