Custom Modules not showing relate fields in export

Hello! I assume I’m just dumb, but I’ve created three custom modules in the module loader, and created the custom relationships to get them all to play nice in Suite. However, when I go to export any of this information, the relationships are not available. For example, I created a new Accounts and Contacts module, and when searching contacts, the related account appears right there in the list. However, exporting that data does not include the relate field. This has become rather troublesome! It also seems to break reporting.

What am I missing?

Thanks for the help!