I have a trial account in dev.azure.com as you can see below:

But for some reason, I am lacking some functionality as you can see below:

I don't understand what could be the issue here.

Thanks for the help.

CodePudding user response：

From your screenshot, you have the free trial of Test Plan.

To use all features of Test Plan in Azure DevOps, you need to grant the Basic Test Plan access level to target acccount in Organization Settings -> Users.

For example:

Refer to this doc about Access Levels.