In nestjs all the `.forRoot` functions appear as unresolved (inside monorepo)

This is a monorepo (yarn workspaces). It compiles and builds just fine. However, in webstorm all the `.forRoot` functions of the modules I have tried so far are marked as unresolved

Is this a bug or something I am missing?

The repo can be found here
https://github.com/ptheofan/nestjs-react-monorepo/blob/master/apps/backend/src/app.module.ts#L12