In Azure App Service, you can easily restore app backups, utilize automatic backups, or make on-demand custom backups. You can restore a backup by overwriting an existing app by restoring it to a new app or slot.
Automatic backup and restore is generally available for basic, standard, and premium App Service plan pricing tiers.
Custom backup and restore is now generally available for basic, standard, premium, and isolated app service plan pricing tiers.
For more information about Azure App Services backups and restore, please visit: Back up an app - Azure App Service | Microsoft Docs