The first step is to define and import the issue link in eazyBI. Please refer to the respective documentation page on how to do that - Import issue links.
After that, please review the following report from the eazyBI demo training account - Story and Bug overview by projects - Issues - eazyBI Demo Training - eazyBI. The report shows stories with some information from bugs linked to them. You can use a calculated measure similar to “Linked Bugs Done” to view the number of linked issues with a particular condition. Replace the condition for status with one for labels with a regular expression check and use the issue link you defined instead of “Bugs”.
Please review the eazyBI documentation page for more information on defining calculated measures - Calculated measures.
Best,