const $metrics = from(axios(options));

const res = $metrics.pipe(
  map((val: any) => {
    console.log("VALUE:", val.data.metrics.length);
    if (val.data.metrics.length === 0) {
      return throwError("data empty");
    }
    return val;
  }),
  delay(2000),
  retry(10),
).subscribe();

VALUE: 0
VALUE: 0
VALUE: 0
VALUE: 0
VALUE: 0
VALUE: 0
VALUE: 0
VALUE: 0
VALUE: 0
VALUE: 0
VALUE: 0