Hi please I need some help understand Turborepo.

I have an internal package which uses mailing.run - it is shared with my api app(Node + Express) and my web app(NextJS).
Everything is fine during the dev. I can run the apps perfectly and also build them .

But when i run turbo start to run the api app i.e turbo run start --filter=api... --include-dependencies
I get this error

Cannot find module '@esw/emails/emails/components/List'

Also when I try to deploy this same api app on Railway.app The build is fine but to run the app with turbo start It falls apart.
I have been looking at the docs it mostly message build, test and linting and not enough about running in production.

My question would be is turbo repo not suited for my use case or is there something I am missing.

Please any help would be much appreciated.