Can't see the button "Create Sub-Test Execution" in a Requirement issue?
Note that the "Create new Test Execution button" is only displayed if Xray can create a Sub-Test Execution for the project the covered issues is on, i.e., the sub-issue type needs to be configured for that project and it should have no required fields apart from the default ones.
Please do the following steps:
The button is still not appearing?
NOTE:
This button is not displayed if you don't have the issue type Sub-Test Execution associated with your project, or if you have configured some extra custom fields as Required.
If you follow the previous steps, the issue type sub-Test Execution is correctly associated, so you need to check if you have any extra custom field as Required.
To be able to check this please go to your Project -> Project Settings -> Fields -> Actions - Edit fields
On the list please check which custom fields are required for the screen that is being used by the Sub-Test Execution and change it to Optional.