Hello @Dean Porter - Thank you for reaching out to us!
Azure Site Recovery currently doesn't Oracle database workload and the database recovery has no guarantee.
Currently ASR supports Oracle Linux 8.3 and not 8.4 yet. No definite ETA to share as of now.
Doc ref: https://learn.microsoft.com/en-us/azure/site-recovery/azure-to-azure-support-matrix#linux
I shall update this forum thread If I get any latest news on support for Oracle Linux 8.4.