Hi,
I haven't found any schedule as per my research, but there's a uservoice feedback which you can vote on.
The more votes the more chance of it being implemented.
Please add Azure Disk Encryption support for RHEL 7.7 and 8.0 and CentOS 7.7 and 8.0 (as soon as it's available).
https://feedback.azure.com/forums/217298-storage/suggestions/38624401-please-add-azure-disk-encryption-support-for-rhel
Best regards,
Leon