Junction Team is a regional resource. All data of the Team are stored in the region you selected. This cannot be changed afterwards. Make sure you choose a region that is suitable to your data residency requirements.

RegionsData Residency
πŸ‡ΊπŸ‡Έ USData stored in United States (Subject to HIPAA)
πŸ‡ͺπŸ‡Ί EUData stored in Belgium (Subject to GPDR)

Your Junction Org is a global resource β€” you can start with a Team in one region and create more in a different region as you expand.