my page not showing in iframe

[Sütő Ádám]

I am trying to make admin page like this in this page: https://developer.atlassian.com/cloud/jira/platform/administration-ui-locations/

I managed to create the sidebar menu item here, but when i click it navigates to my application url, and it load outside jira. I want to open it in iframe inside jira, left side of the sidebar as other page loads.

I try to search connect modules documentation but i couldnt find the solution for this.

Can anybody help me?