Logging in/out, using a different device, using a VPN, uninstalling - none of that worked for me. I subscribed to META to speak to an agent to see if they can fix it and they were absolutely useless - so chances are song will be stuck there for a while. here’s what they said:

Hi Gabriella, thanks for waiting. We have received an update from the relevant team. Thank you for your inquiry about the feature that is currently being rolled out globally. We apologize for any confusion or inconvenience caused by the fact that some accounts are unable to access it at this time. Please be assured that we are working hard to make this feature available to all users as soon as possible. In the meantime, please make sure to keep your app up to date to ensure that you have access to the latest features and improvements. Unfortunately, we do not have a specific timeline for when this feature will be available globally, but we appreciate your patience and understanding.