@OFBC_Nigeria Would love to see such an event happen! I would happily start a team but unfortunately my country doesn't have that many zh players. Would be worth considering merging countries? (e.g. Scandinavia, Western Europe, Asia, etc...)
Also I see you found the ZH Olympiad forum thread, you might want to have a look at this spreadsheet to have an idea of the countries that could have enough players: docs.google.com/spreadsheets/d/1QQ4M7Sl18XSG47qpLFfIQhSoGwRCNJvaN41evaibuWI/edit#gid=1181167563
(Note that this was more than a year ago so interest might have changed)
Also I see you found the ZH Olympiad forum thread, you might want to have a look at this spreadsheet to have an idea of the countries that could have enough players: docs.google.com/spreadsheets/d/1QQ4M7Sl18XSG47qpLFfIQhSoGwRCNJvaN41evaibuWI/edit#gid=1181167563
(Note that this was more than a year ago so interest might have changed)