cli53! It’s the coolest tool you can use for Amazon DNS route53! This is the posting I had tried to follow for backing up my zone files.
https://sysinfo.io/automated-backup-aws-route-53-record-sets/
I suspect that AWS changed the output of this command, so it no longer works. Here’s one that does:
cli53 list | awk '{print $2}' | grep -v Name | while read line; do cli53 export ${line} > ~/backup/${line}bk; done
With this command, it will grab all of the domains and back up each of the zone files.