When you deploy the Einstein Analytics dashboards contain conditional formatting using ANT or Change Set or simply copy and paste the dashboard JSON, conditional formatting will not follow, you need to manually configure the conditional formatting again in the target environment manually.
This is because conditional formatting in the dashboard is stored under dashboard XMD, so if you deploy the dashboard XMD, then conditional formatting will be deployed.
In this blog, I will use Workbench to deploy this.
1. Create package.xml file
<?xml version="1.0" encoding="UTF-8"?>
Test_Conditional_Formatting in above sample is the dashboard API name, you can check dashboard API name from Workbench too https://workbench.developerforce.com/restExplorer.php?url=/services/data/v48.0/wave/dashboards&autoExec=1
2. Retrieve dashboard XMD file
From workbench login to source org. > migration > retrieve, select package.xml prepared in step (1) > click Next button > click Retrieve button > download zip file
3. Deploy Zip file
Make sure the dashboard has been created/deployed in the target org. From workbench login to target org. > migration > deploy > select zip file from step (2) > click Next button > click Deploy button
Now open the dashboard in target org and the conditional formatting has been applied.