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
🇺🇸 USData stored in United States (Subject to HIPAA)
🇪🇺 EUData stored in Belgium (Subject to GPDR)

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