Azure Resource Group Deployment using Release Pipeline taking too much long and never completed

Hello sarape 

Azure writes its logs to a logs table called AzureActivity, you can see this from most Azure blades - look for "Activity Log".   You should see success/failure etc... messages.

This particular forum is for Log Analytics, so in that query language we'd search for the same messages you see in the portal, with something like this.  You can then visualize or alert from them, if that's what you require? 

AzureActivity
//| where ResourceGroup =="DocsFeedback-INT"
| where ResourceProvider == "Microsoft Resources"
| summarize count() by ResourceProvider , OperationName, OperationNameValue, ActivityStatus