Monitoring with prometheus app is not available in HA

Hi,
I am using Rancher v2.7.9 in docker, and i have imported a singe master kubernetes cluster with success and i also managed to deploy in it the monitoring with promethues and grafana app.
Later i tried to import a HA kubernetes cluster that has a load balancer, 2 master and 3 worker nodes.
That went well , but when i tried to deploy the same app of monitoring is not available in apps !!!

can you please help me?