I have my e-mail address as a text replacement. It works ... about 1/10 of the time. The Apple keyboard didn't show text replacements when it wanted to suggest a password. (Not sure if that's still true). The google keyboard is just flaky about using the replacements. I'm usually stuck manually typing through it and fighting autocorrect, sometimes without the benefit of autocorrect suggestions.

Meanwhile, I had to delete the omw replacement which, 100% of the time, replaced with the overly enthusiastic "On my way!".