Microsoft Edge + Internet Explorer mode Getting Started guide (PDF).

Internet Explorer mode in Microsoft Edge | Microsoft Support.

If this option is off, it won’t appear under More tools. To reload the page in Internet Explorer mode, select Settings and more > More tools > Reload in Internet Explorer mode. If the Allow sites to be reloaded in Internet Explorer mode option is turned on, you can open sites that require Internet Explorer in Microsoft Edge using Internet Explorer mode. For better speed and security, we recommend only using Internet Explorer mode when necessary. Most sites work better on modern browsers. If you need to view one of these sites, you can use Internet Explorer Mode in Microsoft Edge. Some sites are built to work with Internet Explorer and have functionality that isn't supported by modern browsers such as Microsoft Edge. The new Chromium based Microsoft Edge is supported on all versions of Windows 7, Windows 8.1, Windows 10, Windows Server (2016 and above), Windows Server (2008 R2 to 2012 R2), and macOS. This new Microsoft Edge runs on the same Chromium web engine as the Google Chrome browser, offering you best in class web compatibility and performance. Microsoft has adopted the Chromium open source project in the development of Microsoft Edge on the desktop to create better web compatibility.

How to Enable or Disable Reload in Internet Explorer mode in Microsoft Edge Chromium

Microsoft edge internet explorer