If you are trying to restore the bacpac on Azure please try uploading the bacpac to storage account and then import it using Azure portal, and do not use SSMS for that operation.
If you are trying to restore an Azure SQL bacpac on a SQL Server on-premise or installed on a virtual machine, try upgrading the SQL Server instance to SQL 2022 and upgrade SSMS. to v19 then import again. You can also try using SqlPackage utility instead of SSMS.