AQL: Filter Issue Scope query to an asset referenced in a linked issue

[Software Craftsmen]

I'm currently facing the following problem in the following sample configuration

I have an issue of type Epic with an asset custom field of type Country
I have an issue of type Task with an asset custom field of type Company

The Country asset has 1..n incoming links from assets of type Company

e.g Austria <- Company1
                      <- Company2
       Germany <- Company100

I'd like to limit the assignable asset objects in a given Task T1 under an Epic E1 (with Country=Austria) to Company1 and Company2, but not Company100


I couldn't find a sample in the following documentations:

• https://support.atlassian.com/jira-service-management-cloud/docs/use-assets-query-language-aql/#Reference-functions
• https://community.atlassian.com/t5/Jira-Service-Management-articles/Announcing-Filter-Issue-Scope-for-Insight/ba-p/1737942
• https://community.atlassian.com/t5/Jira-Service-Management/AQL-Chained-References-Similar-to-JOINing-in-SQL/qaq-p/2297981

Any hints highly appreciated
kind regards