Hey,
Below links can help :
https://learn.microsoft.com/en-us/answers/questions/138430/azure-data-factory-failures-and-disaster-recovery.html
https://www.linkedin.com/pulse/planning-azure-data-factory-disaster-recovery-arvind-periyasamy
Also, you can export the ARM templates as code backup and/or source control ADF in GIT integration
https://learn.microsoft.com/en-us/azure/data-factory/source-control