Backup size in DBCS object storage

Dear Team,

We are using oracle dbcs with automatic configured backups to object storage. We are trying to find the size of the backups in object storage. But looks like it is not giving the result,instead i can see the backups shown are manually backup which we created using console during our recent migration. How can we get the actual size of the backups. We have 7 days retention, In console we can see backups but not showing any size.

[root@almnc~]# oci db backup list --compartment-id ocid1.compartment.oc1..aaaaaaaatsp5gg*****ajbuc3jqoewnw6lremoleiq --all



{

  "data": [

    {

      "availability-domain": "dVQf:AP-HYDERABAD-1-AD-1",