Hi, I'm not sure if you have a specific question on this but I've linked a few documents below that explain how to set all of this up which I hope you will find useful here.
https://learn.microsoft.com/en-us/azure/site-recovery/site-recovery-sql
https://learn.microsoft.com/en-us/azure/azure-sql/virtual-machines/windows/availability-group-overview?view=sql-server-ver15
https://learn.microsoft.com/en-us/azure/azure-sql/virtual-machines/windows/availability-group-manually-configure-multiple-regions