Chrome has default font fallbacks set up on a per-script, per-OS basis. See for example https://chromium.googlesource.com/chromium/src/+/master/chrome/app/resources/locale_settings_mac.grd#160, which is the default font for characters in the Japanese-language script.

Electron does not set up these font fallbacks, and as a result, font rendering in those scripts does not match that of Chrome. Further, it's impossible to set it up on the app side to use the appropriate font fallbacks, because of #15480.
atom/browser/atom_browser_client.cc
base::CommandLine* command_line,
    int process_id) {
  
  {
    base::FilePath child_path;
    base::PathService::Get(content::CHILD_PROCESS_EXE, &child_path);
    base::ThreadRestrictions::ScopedAllowIO allow_io;
    CHECK(base::MakeAbsoluteFilePath(command_line->GetProgram()) == child_path);
  }
  std::string process_type =
      command_line->GetSwitchValueASCII(::switches::kProcessType);
  if (process_type != ::switches::kRendererProcess)
    return;
  
  static const char* const kCommonSwitchNames[] = {switches::kStandardSchemes,
                                                   switches::kEnableSandbox,
                                                   switches::kSecureSchemes};
  command_line->CopySwitchesFrom(*base::CommandLine::ForCurrentProcess(),
                                 kCommonSwitchNames,
                                 arraysize(kCommonSwitchNames));
  
  if (!g_custom_service_worker_schemes->empty())