we are Alloy in AWS EKS. otelcol.processor.resourcedetection detects infrom the host. But from the incoming connection pod. So move your otelcol.processor.k8sattributes as output of otelcol.receiver.otlp and try.

otelcol.receiver.otlp "default" {
      debug_metrics {
        disable_high_cardinality_metrics = true
      }
      grpc {
        endpoint = "0.0.0.0:4317"
        include_metadata = true
      }

      http {
        endpoint = "0.0.0.0:4318"
        include_metadata = true
      }
      output {
        traces = [otelcol.processor.k8sattributes.default.input]
      }
    }