Is there a way to get the underlying NSURLErrorDomain (code) in React Native on iOS?

Question

In our React Native app we use TrustKit for certificate pinning on iOS. If the certificate validation fails and I catch the error within the JavaScript context (example below), logging the error only shows a generic error message: TypeError: Network request failed.

Since the error doesn't stem from an http status code, like 404, I believe I need to inspect the NSURLErrorDomain code (for example) so that I can map it with the correct error handling. Are there any APIs in React Native, fetch, axios, or another package that would provide access to these error details?

fetch(myURL).then(() => true, (error) => {
    console.log(error) //TypeError: Network request failed
    return false;
})