Azure SQL Server Metrics : is 100% CPU percentage is a blocker for all DB operations?

This is with Azure Sql managed Instance, We have observed a case in our database where the CPU percentage is 100% for quite some time but my application are still able to hit & operate over DB, is 100% CPU usage isn't a blocker for DB operations? I see 2 CPU metrics 1) CPU Percentage(MAX) 2) SQL instance CPU percentage(MAX) what is the difference between them? In my case CPU percentage is 100% but SQL Instance CPU percentage is 50% only please share me insights on this metrics and how to translate this.