No. The FreeStyle Libre systems^ have specific regulatory requirements that often vary by country.  Thus, FreeStyle Libre 2 readers and Sensors purchased in one market may not be compatible with FreeStyle Libre 2 readers and Sensors purchased in other markets. If you are travelling, it is advisable to ensure that you take enough Sensors with you to last the duration of your trip.

^ FreeStyle Libre systems refers to the FreeStyle Libre and FreeStyle Libre 2 systems