Quarkus micrometer not consumed by APM server

I'm trying to push traces and metrics from a Quarkus application to APM Server (version 8.3) by using opentelemetry. For traces, it works fine, I'm able to retrieve my data in elastic indexes, but not for metrics, it seems APM server ignore what is sent.
My quarkus application uses micrometer to gather metrics, and quarkus-micrometer-registry-otlp to format and send data.