The prefix "euro" is not related to Europe or the euro currency — it indicates placement outside the issuer's domestic market, under international rules and through a syndicate of foreign organizers. A dollar-denominated issue by an Uzbek company placed in London is a eurobond.
Issuers include governments, banks, and large corporations. Reasons for entering the external market include access to a broader investor base, the ability to attract larger volumes and for longer periods than the domestic market allows.
Uzbekistan has been placing sovereign eurobonds in international markets since 2019, including issues denominated in sums. Following sovereign issues, individual banks and companies have entered the external market. A sovereign issue is important both directly and indirectly: its yield sets a benchmark for borrowing costs for all other issuers in the country.
For a private investor, key features are currency denomination and high entry threshold. Returns on such securities depend on both the coupon and exchange rate: if the sum strengthens, the result in national currency will be worse than expected.