Is the bandwidth usages update analytics instant or not?

The bandwidth usage analytics is not instant. The analytics update time is dependent on the network that you are using.

1. The Standard, Volume, and premium network usually takes up to 24 hrs of time.
2. The enterprise network usually takes up to 3 days of time.

For checking the CDN usage and statistics, you can refer to this link

How to check my CDN usage and stats?