Logic or automation that will carry out Junit XML test naming, stashing and unstashing

Within a Jenkinsfile, I am running regression tests in pytest and using the --junitxml flag to produce test output. Each regression test runs in its own stage and captures an .xml file with the test output, I then stash these xml files (as each stage runs on a different agent). After all the regression tests have been run, the stashed files are then recovered for reporting once all tests are done.

Please see below:

stage ('Regression 01') {
    agent {
        label 'rhel1'
    }
    steps {
        sh "cd /directory1/appServer && /home/appServer/py/venvs/*/bin/python -m " + 
        "pytest -m fast test-dir/regression_test.py -c conf.cfg --junitxml /share/01.xml"
        stash includes: '01.xml', name: 'test01'
    }
}

stage ('Regression 02') {
    agent {
        label 'rhel2'
    }
    steps {
        sh "cd /directory1/appServer && /home/appServer/py/venvs/*/bin/python -m " + 
        "pytest -m fast test-dir/regression_test.py -c conf.cfg --junitxml /share/1.xml"
        stash includes: '02.xml', name: 'test02'
    }
}

post {
    always {
        unstash 'test01'
        unstash 'test02'
        junit "*.xml"
        ...
    }
}    

I have a total of 10 regression tests running which each stash a unique .xml file, I am also looking to add more, therefore hardcoding the XML test names is not feasible.

How can I create some sort of automation or logic within my Jenkinsfile that will do the XML naming, stashing and unstashing?