When attempting to add a new USER_DSN, it's failing for me.
0120:trace:odbc:SQLConfigDataSourceW 0001009E, 1, L"MySQL ODBC 8.0 Unicode Driver", (null) 0120:trace:odbc:DllMain proxy ODBC: 78D20000,1,00000000 0120:trace:odbc:SQLGetPrivateProfileStringW L"MySQL ODBC 8.0 Unicode Driver" (null) L"" 0031C184 4096 L"ODBCINST.INI" 0120:fixme:odbc:SQLPostInstallerErrorW 7 L"Cannot find driver"
The driver entry can be found under HKEY_LOCAL_MACHINE. My understanding is that the MySQL driver is attempting to retrieve default values before loading it's dialog.