Apollo Angular v2 multiple endpoints loaded from json

I am working on an Angular 9 app that uses @apollo/client@3.4.16 and apollo-angular@2.6.0. I'm trying to use named clients. I initialize the clients in the forRoot method of a module that is passed the url. (My module is in a library and the url is passed from a json file from the consuming app). Here is my code:

@NgModule({})
export class MyModule {
  public static forRoot(myUrls): ModuleWithProviders<MyModule > {
    return {
      ngModule: OdpCovid19UiModule,
      providers: [
        {
          provide: APOLLO_NAMED_OPTIONS,
          useFactory: (httpLink: HttpLink): NamedOptions => {
            return {
              'default': {
                link: httpLink.create({
                  uri: myUrls.firstUrl
                }),
                cache: new InMemoryCache(),
                defaultOptions
              },
              'secondClient': {
                link: httpLink.create({
                  uri: myUrls.secondUrl
                }),
                cache: new InMemoryCache(),
                defaultOptions
              }
            };
          },
          deps: [HttpLink]
        }
      ]
    };
  }
}

Running the app with this code doesn't cause errors, but my endpoints are never called. If I run the app configured with APOLLO_OPTIONS instead of APOLLO_NAMED_OPTIONS the endpoints are called.

How can I configure this correclty? Is there another way I can used named clients that are passed a url loaded from a config file?