Can I use a mixin inside <script setup> tag?

I'm using vue 3 and I did initialize a global mixin by adding it to vue.mixin() in my app.js file.. and I use it in my vue components normally in the HTML tags. Now I want to use it inside the tag I used it the same way as in templates by calling it normally but it throws an error Uncaught (in promise) ReferenceError: mixinName is not defined so? any idea?