Uninstalling Apps via Admin By Request (Intune devices) - User Guide
With the new Intune devices
You should be able to uninstall via "ABR (admin by request) yourself by doing the following:
Select the green tick

Go to Tools > Uninstall Program

On the Prompt > Select "yes" then "OK"
In the window, select the app you want to install

Click uninstall
This should then go through the uninstall process
If you are still having issues.
Please reach out to the agent who helped with your request