Missing documents in opendistro alerting indexes

Hi
Is there any reason why I do not see any documents in opendistro alerting indexes such as
.opendistro-alerting-alerts
.opendistro-alerting-config
.opendistro-alerting-config
etc

I have already created some monitors and have working alerts but do not see any data in these indexes. I’m using admin account, do I miss any additional permissions?

Thanks for the answer