RxJS how to return request cache and make new request?

Question

Angular

Hello.

I have a request in a service:

getOrderGSInfo(): Observable<OrderInfoGame[]> {
    return this.http
      .get<OrderInfoGame[]>(`${environment.api.url}billing/gs/order`)
  }

And the call in the component:

this.billingService.getTestGSInfo().subscribe(next, error)

I need to make it so that when subscribing at the beginning, data from the cache is returned without waiting for a response from the API (it is done anyway), and then new data comes from the API.
How to implement this?