That’s dictionary.com pointing out that it is now in common enoudh use to be a word. English isn’t French, we don’t have a language police that comes to chop off your head if you use a newer spelling, and I don’t think we should either. Sike is correct now.

This is the way

layouts is easy, but I’m afraid it does not support dictionaries, so that might be a dealbreaker for you

You would like unexpected keyboard for your phone then. It supports en–dashes, em—dashes and non-breaking spaces without needing a symbol layer.

I just switched to a keyboard that has both em- and endashes, so I am slightly irritated that using them would make my writing look like ai now