@Mikołaj Piecuch Thanks for your patience! This issue is mitigated now. I'm glad to hear that the pairing setup for your Service Bus instances is now completed.
In general, it is a good practice to monitor the Azure Service Health dashboard and subscribe to Azure Service Health alerts to stay informed about any service disruptions or outages that may affect your Azure resources.
If you encounter any issues in the future, you can also contact Azure support for assistance.
Please accept as Yes if the answer provided is useful, so that you can help others in the community looking for remediation for similar issues.