Hi DY,
Based on your question we understand that you want to move all resources from one resource group to another.
Here are some steps you can take to troubleshoot and resolve the issue:
Public IP looks to be supported to be moved - you may have to Disassociate It first.
Recently, Microsoft introduced the ability to migrate Standard SKU public IPs across subscriptions; however, this is only possible if they are not associated with any resources.
you need to move all the resources to the resource group where the resources are hosted,
In the hosted resource group, enable hide resources.
Select all resources
For better understanding please refer this document:
https://learn.microsoft.com/en-us/azure/azure-resource-manager/management/move-resource-group-and-subscription#use-the-portal
If you are still facing any issue, please let us know in the comments. We are happy to assist you.
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