@Ananya Sarkar
Thank you for your post!
When it comes to Azure PowerShell within the Portal, there isn't a way to "run as administrator". When you launch Cloud Shell, you'll be using the user's RBAC or AzureAD permissions that you're signed in with when you run Azure PowerShell commands. You can also use the "-Force" parameter as needed when executing commands.
If you're using Azure PowerShell on your desktop, you can simply right-click your PS icon and select run as administrator.
If you have any other questions, please let me know.
Thank you for your time and patience throughout this issue.
----------
Please remember to "Accept Answer" if any answer/reply helped, so that others in the community facing similar issues can easily find the solution.