Internet Explorer has been officially retired. Microsoft has retired Internet Explorer 11, the most recent version of the legacy browser, after 26 years. This guide will show you how to set the IE mode in Microsoft Edge.
Allow sites to load in Internet Explorer
First, open the settings page and search for ” IE mode “

And, scroll down to “Allow sites to be reloaded in Internet Explorer mode (IE mode)” and switch the state to Allow.
Show the IE mode button

Then, scroll up and activate the IE mode button.
You will have IE mode button appearing on the top

Which will be clickable for sites that can be opened using internet explorer
