TestNG Reports not getting from jenkins

1. My jenkins running on AWS ECS with EFS attached

2. Below is my post build actions

post {
        always {
            withAWS(region: "us-east-1") {
                s3Download (
                    bucket: "${DDC_WORKING_BUCKET}",
                    file: 'test-results.zip',
                    path: "${path}/test-results.zip",
                    force: true
                )
            }

            unzip(
                zipFile: 'test-results.zip',
                dir: 'reports'
            )
            dir('reports') {
                script {
                    report_files = findFiles(glob: '**/*.html').join(',')
                }
            }
            step([$class: 'Publisher', reportFilenamePattern: 'reports/**/target/surefire-reports/testng-results.xml'])
            junit allowEmptyResults: true, testResults: 'reports/**/*.xml'

            publishHTML target: [
                allowMissing: false,
                alwaysLinkToLastBuild: true,
                keepAll: true,
                reportDir: 'reports',
                reportFiles: "${report_files}",
                reportName: 'Test Results'
            ]

        }

3. Console Output(some part ) of the job is

[Pipeline] {
[Pipeline] script
[Pipeline] {
[Pipeline] findFiles
[Pipeline] }
[Pipeline] // script
[Pipeline] }
[Pipeline] // dir
[Pipeline] step
TestNG Reports Processing: START
Looking for TestNG results report in workspace using pattern: reports/**/target/surefire-reports/testng-results.xml
Did not find any matching files.
[Pipeline] junit
Recording test results
None of the test reports contained any result
[Checks API] No suitable checks publisher found.
[Pipeline] publishHTML
[htmlpublisher] Archiving HTML reports...
[htmlpublisher] Archiving at BUILD level /var/jenkins_home/jobs/ddc/jobs/ttx/jobs/qa-po-meta-job-Fixes-Ale2/workspace/reports to /var/jenkins_home/jobs/ddc/jobs/ttx/jobs/qa-po-meta-job-Fixes-Ale2/builds/20/htmlreports/Test_20Results
[Pipeline] cleanWs
[WS-CLEANUP] Deleting project workspace...
[WS-CLEANUP] Deferred wipeout is used...
[WS-CLEANUP] done

4. Mounted the EFS volume to local system and looked for the reports, I couldn't find and reports, only htmlpublisher and some xml files are there.

5. I guess after completing the job workspace is deleting by the pipeline itself so we can't see any content after mounting EFS(Is that assumption is correct?)

What I am doing wrong here?