Ok sure, but 99% of applications out there do not fit this description.
If you're building an SPA that's identical to a native app, I think someone in the exec team is making poor decisions
Either make a web app or a native app... don't do both
The only difference between a browser-based (or Electron) SPA and a native app is which runtime and rendering engine you are using. Why would API calls to the backend be different in either case?
Sure. But we're talking about needing the same API for two separate clients...
That infers building both and I'm questioning why you would build both if they're identical. Just build one and get your users to use it
Look around..no one is building native clients for every desktop OS anymore. Web, iOS and Android are the way to go for modern apps.
There was almost zero crossover in functionality