@Camila Souza (International Supplier) Thanks for reaching out to Microsoft Q&A, apologize for any inconvenience caused on this.
If you are moving the App service and the associated app service plan from one resource group to another resource group then the inbound IP address for the app service doesn't change, so the URL of the web app will remain the same.
Please note that the destination resource group must not have any existing App Service resources, including Web Apps, App Service plans, Uploaded or imported TLS/SSL certificates, and App Service Environments.
I understand that you want to clone all the app service and app service plan to a single resource group with same webapp root URL which is not supported. App service name will be unique across the regions you need to pass the different Name and the respective URL of the app will get changed as well.
Refer to these documentations about Azure App service cloning and its limitations.
Feel free to reach back to me if you have any further questions on this.