It looks like this is a duplicate of this request:
The name of the feature has changed from Filament Backup to Auto Refill which caused my basic search to miss the previous thread.
From the other thread, BambuLab has captured this as an internal requirement with the ID BBL001-4595. That was back in March’23 and has has not been added to BambuStudio nor has there been an update on when it will be added. @rocky.chen it would be great to get a follow-up on this.