How can I use wiremock to test webclients?

Question

What the below code does is that it gets items for specific(using client1) customer and delete them by making another endpoint, client2. The first endpoint provides pagination.

Now, I am having issue with testing it. As you can see, I am using wiremock but it does not seem working properly as the last endpoints never called. I have provided the response body for the first stub, was expecting the next endpoints to be triggered. I tried to debugging by putting break point to see if they are called, but the code never reach the section where the two endpoint are triggered. I am not sure the way I did is correct. Is this the correct approach to test using wiremock?

public void deleteItems(String id) {
    client1.get()
        .uri(urlBuilder -> urlBuilder
            .path(CLIENT_ONE_ENDPOINT)
            .queryParam("email", id)
            .build())
        .retrieve()
        .bodyToMono(Items.class)
        .expand(items -> {
            while (!items.isOnLastPage()) {
                int nextPage = items.getCurrentPage() + 1;
                return client1.get()
                    .uri(builder -> builder
                        .path(CLIENT_ONE_ENDPOINT)
                        .queryParam("email", id)
                        .queryParam("pageNumber", nextPage)
                        .build())
                    .retrieve()
                    .bodyToMono(Items.class);
            }
            return Flux.empty();
        })
        .flatMapIterable(Items::getResults)
        .map(or -> {
            return client2.delete()
                .uri(CLIENT_TWO_ENDPOINT + or.getId())
                .retrieve()
                .bodyToMono(ResponseEntity.class)
                .subscribe();
        })
        .subscribe();
}

wiremock test

@Test
void itemsAreRemoved() {
    String email = "example@example.com";
    String itemId = "001";

    WireMock.configureFor(PORT);
    wireMockServer.stubFor(get(urlPathEqualTo(CLIENT_ONE_ENDPOINT))
        .withQueryParam("email", equalTo(email))
        .withHeader("Content-Type", equalTo("application/json"))
        .willReturn(aResponse()
            .withHeader("Content-Type", "application/json")
            .withBody(loadResponse(itemId))
            .withStatus(200)));
    wireMockServer.stubFor(get(urlPathEqualTo(CLIENT_ONE_ENDPOINT))
        .withQueryParam("email", equalTo(email))
        .withQueryParam("pageNumber", equalTo("1"))
        .withHeader("Content-Type", equalTo("application/json"))
        .willReturn(aResponse()
            .withHeader("Content-Type", "application/json")
            .withStatus(200)));
    wireMockServer.stubFor(delete(urlPathEqualTo(CLIENT_TWO_ENDPOINT + itemId)));

    service.deleteItems(email);

    verify(getRequestedFor(urlPathEqualTo(CLIENT_ONE_ENDPOINT))
        .withQueryParam("email", equalTo(email)));
    verify(getRequestedFor(urlPathEqualTo(CLIENT_ONE_ENDPOINT))
        .withQueryParam("email", equalTo(email))
        .withQueryParam("pageNumber", equalTo("1")));
    verify(exactly(1), deleteRequestedFor(urlPathEqualTo(CLIENT_TWO_ENDPOINT + itemId)));

}