The bug is in the org.apache.camel.component.minio.MinioProducer.deleteObjects() method.
Minio API expects client to iterate the target objects by themselves, but the MinioProducer.deleteObjects() has no iteration in the method.

https://min.io/docs/minio/linux/developers/java/API.html#removeobjects-removeobjectsargs-args
Removes multiple objects lazily. Its required to iterate the returned Iterable to perform removal.

rhi-camel-spring-boot-3.14.2.CR6-src/camel-3.14.2/components/camel-minio/src/main/java/org/apache/camel/component/minio/MinioProducer.java

    private void deleteObjects(MinioClient minioClient, Exchange exchange) throws Exception {
        if (getConfiguration().isPojoRequest()) {
            RemoveObjectsArgs.Builder payload = exchange.getIn().getMandatoryBody(RemoveObjectsArgs.Builder.class);
            if (isNotEmpty(payload)) {
                minioClient.removeObjects(payload.build());
                Message message = getMessageForResponse(exchange);
                message.setBody(true);
            }
        } else {
            throw new IllegalArgumentException("Cannot delete multiple objects without a POJO request");
        }
    }

It looks like there is no test code for MinioOperations.deleteObjects in org.apache.camel.component.minio.integration.MinioDeleteBucketOperationIT test class.