For providers that just act as middlemen, I assume data that doesn't have a residency requirement is stored outside, so probably

a) letting customers in other areas know that their data is backed up to another continent

b) asking the AI model of your choice to translate the following into PR-speak: "Because of the boneheaded data residency requirements in this country, all your data is gone, and we weren't able to do anything about it - here's an empty copy of a re-setup version of whatever infrastructure we provide, glhf setting up everything from scratch, hope you had backups"

For customers who use such a provider or operate primarily in that area: Restore from local backups, or tell whoever depended on you that everything is gone and if you really didn't have backups, probably close up shop.