I saw a google authenticator copy (using the old icon but named Authenticator) about two weeks ago. It was the top result but an ad and not by Google. Sad I didn't screenshot it, couldn't find it when searching Google Authenticator again.
It annoys me so much that every authenticator is just called authenicator these, days. like its google authenicator, or microsoft authenicator, not just authenticator
Yes, theres a similar one for Microsoft Authenticator which obviously tries to con you into installing it by also advertising that it allows you to "sign in to your Microsoft accounts".