Salesforce: Publish Between Orgs using SFDX

copy_between_orgs.sh

sfdx alias set awh_production=developer+abc@movedata.io
sfdx force auth web login -a abc_production

sfdx alias set whf_sandbox=developer+xyz@movedata.io.movedata
sfdx force auth web login -a xyz_sandbox -r https://xyzfoundation--movedata.sandbox.my.salesforce.com

sfdx force:mdapi:retrieve -k package.xml -s -r . -u abc_production
unzip ./unpackaged.zip -d ./unpackaged
sfdx force:mdapi:deploy -d ./unpackaged -w 10 -u xyz_sandbox

package.xml

<?xml version="1.0" encoding="UTF-8"?>
<Package xmlns="http://soap.sforce.com/2006/04/metadata">    
    <types>
        <members>MoveData_Donation_Contact_Post_Upsert_Ext</members>
        <name>Flow</name>
    </types>
    <version>55.0</version>
</Package>