Custom metrics didn't indexes

[NaorPeretzIonix]

Describe the bug
I send custom metrics using
metric_set.counter(name=task_metrics_name, reset_on_collect=False, labels=labels).inc(value), the metric is on the elastic side but from the dictionary with the fake data:
{'company': 'brightwoodlp', 'scan_frequency': 'Monthly'}
I get this:

we are getting just labels.labels and the unparsed dictionary, as I read and know it should be indexed to allow search and more.

To Reproduce
Steps to reproduce the behavior:

1. I use elastic-apm==6.19.0, python 3.8.10 configuration code:

    def config_elastic_setup_metrics(self, SERVICE_NAME, ENV, ELASTIC_AUTH_TOKEN, METRIC_SET_SUBCLASS: MetricSet,
                                     ELASTICSEARCH_ENDPOINT=MetricsConsts.ELASTICSEARCH_ENDPOINT):
        self.elastic_apm_client = elasticapm.get_client() or elasticapm.Client(
            # Set the server URL
            service_name=SERVICE_NAME,
            server_url=ELASTICSEARCH_ENDPOINT,

            # Set authentication credentials (if needed)
            secret_token=ELASTIC_AUTH_TOKEN,
            environment=ENV,
            # Other configuration options...
        )
        metric_set = self.elastic_apm_client.metrics.register(METRIC_SET_SUBCLASS)
        self.metric_set = metric_set
        return metric_set

then I call:
self.metric_set.counter(name=task_metrics_name, reset_on_collect=False, labels=labels).inc(value)

then I got the APM and searched for the value of task_metrics_name, we don't have any logs about errors but the metric doesn't as we expected

Expected behavior
I expect to get the field names and values:
label.company: "brightwoodlp"
label.scan_frequency: "Monthly"

in exsit format it's more like metadata, unsearchable and unindexed.

Thank you, Naor.

[NaorPeretzIonix]

when I called:

self.metric_set.counter(name=task_metrics_name, reset_on_collect=False, **labels).inc(value)

I got :
labels.company: tcnewco
labels.scan_frequency: Continuous