Hi @itsvkn
If you've enabled ingress on the app, there's a default configuration that you can check under Container > select the container > Health Probes. You review these examples to change your configuration. You can also view the Container Apps Health Probe Failures that's a detector under Diagnose and solve problems blade.
Your container will get pulled when a new revision is available, see Update and deploy changes in Azure Container Apps | Microsoft Learn for those details. But under the Diagnose and solve problems blade, click on Availability and Performance category to use those detectors to check for errors regarding loading the revision.