It's a bit funny. On macOS en and em dashes can be natively typed with alt+- and alt+shift+-. The responses to your comment are apparently suggesting these methods are just as easy as that:

1. Install and configure this extra tool, which also by default enables a ton of other things you may not want, and may as well be a third-party tool even though it's technically built by Microsoft

2. Do a Google search and copy-paste (!)

3. Use a keyboard shortcut to bring up a symbol picker, then click on the tab containing the en and em dashes, then click to type them in

I mean, come on.