It appears when exporting historical data, and if the item name contains an user macro, then it does not automatically expand:

grep test-agent /apps/zabbix/zabbix-export/*ndjson
/apps/zabbix/zabbix-export/history-history-syncer-1.ndjson:{"host":{"host":"test-agent","name":"test-agent"},"groups":["Zabbix servers"],"item_tags":[{"tag":"Application","value":"Zabbix agent"}],"itemid":48195,"name":"Default agent config file {$DEFAULT_AGENT_CONF} exists","clock":1725930135,"ns":193820850,"value":1,"type":3} 

It is worth saying that the macro does not expand while browsing the "Items" configuration page. This is by design so far (certain benefits in the dashboards while targeting an item name).

Could a flag be implemented to support expanding macros in item names before streaming data to other systems?