@hendrik.oosthuizen - That is not the root cause. I am running these on Xeon processors and still have the interface limit. What image are you using? Last image I tried was xrv9k-fullk9-x-6.2.25.qcow2
The device will support some interfaces but not all. The state of what I have been able to do with kvm is still 22 interfaces, as mentioned in my previous post. Although, I haven't tried much since my last post as I am not actively using the XRv.
Do you have any null routes that might be used to encompass a range for loopbacks? I've commonly used null routes for loopback ranges just to ensure advertisement at an aggregation point.