That sounds doable. Please create an issue on XO GitHub issue tracker

About Nagios and XO backup: https://xen-orchestra.com/blog/xo-backup-reports-in-nagios/

But ideally, I'd like a better "specification" on exactly what you need (feel free to provide screenshots)

There is a Nagios plugin in this case. Also there is multiple way to actively parse XO logs and put them somewhere else. But I'm not sure it's exactly what he needs.

I'm not sure to understand what do you need exactly? Is the "backup" view log doing what you need or you need something else?