Previously backups were unencrypted which meant viewing them was as simple as just opening the tar file. Now since they are encrypted(which is a plus), this can not be. Ideally the encryption would be done in a way such that tools like 7zip can automatically decrypt/open them with the secret key, but alternatively it should be possible to explore files within backups within HA natively
The easiest method would be HA reinstating the option to have unencrypted backups.
They still exist…
Many of these have a zip related encryption option as well.