Hi @Anvy Elizabeth Thank you for posting your question on Microsoft Q&A and for using Azure services.
As @Alberto Morillo mentioned above, YES, it is possible to reverse migration from hyperscale to General purpose service tier. In Addition to the above answer please refer to one of our blogs.
How to reverse migrate your Azure SQL Database from Hyperscale tier to General Purpose tier
*I have seen a dialogue that you can move to General purpose tier up until 45 days after updating to hyperscale. *
yes, reverse migration is only available within 45 days of the original migration to Hyperscale.
Please do not forget to mark as accept answer whenever information provided were helpful.
Regards,
Oury