Restore a backup from a failed SD card on Raspberry Pi

My RP4 stopped booting after I got a random “configuration.yaml is missing” message (brand new RP4). I did take some backups within HA but obviously cannot access these using HA (questionmark over HA’s backup system).
I’ve taken out the SD card and I’ve also made a copy of it on my Mac called backup.dmg.
I have a spare blank SD card.
The question is: if I start again installing HA on my fresh SD card with the RP4, how would I get the backup off the original card?

copy backups to another location:

to read your card on macOS :

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