Add option in Dexcom Share settings to use existing US server our non US server (US:share1.dexcom.com, non US:shareous1.dexcom.com)
I have tried manually editing Loop>Loop>Managers>KeychainManager+Loop.swift to update DexcomShareURL.
This gives the error 'The operation couldn't be completed. (ShareClient.ShareError error 1.) loginError("SSO_AuthenticatePassword invalid"), but keeps the account details.