What do you mean by Excel Reports? If you mean to extract issues to Excel then you can use Xporter plugin
The plugin has API. You can make a service either in Jira or OS or anywhere you like and use the API to extract issues to Excel format
This question is a duplicate of https://community.atlassian.com/t5/Jira-Software-questions/Derive-Excel-Reports-Automatically/qaq-p/695469
Like answered there, this use case can be solved with the Excel Automation Plugin. The full solution requires two further apps, so see the detailed answer at the other question.
...PermissionsStartOnly=true User=www-data Group=www-data ExecStart=/opt/jira/bin/startup.sh ExecStop=/opt/jira/bin/shutdown.sh TimeoutStartSec=120 TimeoutStopSec=600 PrivateTmp=true [Install] WantedBy...
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