Frozen Node Snapshot Repository storage metric

[RorFis]

Hi,
I use the elastic_exporter to monitor the disk space used by my elastic cluster. I just added a frozen node and my monitoring system is showing the disk space is used at 90% for this new node. The value seems to be the same on the Elastic Cloud Deployments Monitoring (Which I suppose is the disk from the actual node). However, I'd like to monitor the actual disk space used by the snapshot repository (I used the default one, found-snapshots) where I need alerting to know if the disk is full. On the elastic cloud summary for my deployment, I do have this info but I don't know if it is retrieved by the exporter :

Is there a metric with this value ? I can't find it if there is.
Thanks !