I keep getting a wrench that comes up in my home screen up in the right hand setting bar by my battery and time etc bar. It goes away, but always comes back lately. I'm on a Moto X4.
Nothing I've googled mentions a wrench with the Moto. If it appears when you pull the notification bar down you can long press it and it should tell you the source app and may offer you an info button as well. It sounds app related whatever it is.
Welcome to the forums. I remember reading a few threads about a similar icon, but it was on the left side of the status bar. It was related to the new Google privacy policy and one needed to agree to the new terms.
Can you post a screenshot with that icon so we can have a better idea?