Most "enterprise" application backends are still written in Java (and probably C#) combined with a frontend based on Angular, sometimes Reacts or older technologies. I am not aware of any Node-based backend at any of our customers (medium/large German companies), except maybe for some smaller parts of the backend (microservices architecure etc.)

Ah, also, not sure if you were joking, but I don't think using JavaScript (TypeScript, that is) in both frontend and backend is a bad idea. Having a shared (domain) model can be a real boon. Admittedly, JavaScript lacks a few things that is offered by Java and the like that makes not yet fit for larger applications though (say DI, modularization and so on).