How to read flags on jenkins jobs

We have two scripts (one for Katalon and one for Python) that we want to launch from Jenkins. First we want to launch Katalon and, at a certain point in the script, tell Jenkins that launch the python script. Then finished the python script, Jenkins should tell katalon that can continue.

Current jenkins pipeline code:

"pipeline {
       agent any
    
       stages {
          stage('Unit Test') {
             steps {
                echo 'Hello Example'
                bat """./katalon -noSplash -runMode=console projectPath="/Users/mypc/project/proyect1/example.prj" -retry=0 - 
    testSuitePath="Test Suites/IOS/TestSuiteAccount" -executionProfile="default" - 
    deviceId="example" -browserType="iOS" """
                sleep 5
             }
          }
          stage('Unit Test2') {
             steps {
                echo 'Start second test'
                bat """python  C:\\Users\\myPC\\Documents\\project\\project-katalon-code\\try_python.py"""
                sleep 5
             }
          }
       }
    }"

In pseudocode it would be the following:

Katalon script:

my_job()
call_jenkins_to_start_python()
if jenkins.python_flag == True
    my_job_continue()

Pipeline Jenkins script:

Katalon.start()
if katalon_sent_signal_to_start_python == True
    start_python_job()
if python_finished_job_signal == True
    send_katalon_signal_to_continue()

Would be a good solution to read/write an external file? Didn't find anything similar.

Thank you!