“In return for a 99-year lease for the military base, the islands will become part of Mauritius.”
The UK handed the Chagos Islands to Mauritius on October 3. If IO drops out of the ISO country list, IANA blocks new .io registrations and retires the rest within three to five years. Nobody even knows how many .io domains exist. Every .io startup built its brand on a British territory and never read the lease.