Hey @VitorPelizza,
Apologies for the delayed response, this slipped by. We recently announced that Data Residency was available for Admins under a beta label. Subsequent to this release, we have been working on ways better communicate the status of Apps, particularly where they do not store data outside of Atlassian.
While we certainly want to explore the persistence of realms on app reinstallation, it is not something which we have planned for the short to medium term. It would be great to learn more about why you see this as a blocker and if there are any other considerations we should make as we explore this functionality. Please feel free to book some time in my calendar to connect and discuss this (or general data residency in Connect) further.
Thanks,
Sean