Messages using all iCloud storage space
I'm trying to troubleshoot iMessage issues with my wife's iOS devices as somewhere along the way Messages was disabled in iCloud so changes were not being synchronized across her devices. After enabling Messages in iCloud on her iPhone 13, iPad Air 4, and Macbook Pro it's now showing that all of her iCloud storage space is used.
What I don't understand is that when I look at iPhone storage for Messages and it shows that it's using 600MB of space on her phone, but when I look at her iCloud storage it shows Messages is using 2.9GB of space.
I have also changed the message history to 1 year (although it resets to forever any time I enable/disable Messages on a device to troubleshoot).
Is there a period of time that needs to elapse before iCloud storage reduces to the same as what shows on the individual devices?
Is there something I'm missing that is causing the Messages in iCloud to not be removed/deleted to match the devices?
Thanks in advance for any assistance.