mixins in Vue 2 vs composables in Vue 3

Question

I am building a Vue 3 project based on existing Vue 2 project and I am new to Vue 3. In old project, data is shared between mixins and components so that I don't have to pass them from components to mixins or between mixins themselves But in my new Vue 3 project, I have to pass data from component as parameters to functions in composables. Here is a example:

// Home.vue
import { transformData } from './transformer'
const listServiceGroup = ref({})
result = transformData(listServiceGroup)

Here is the problem: I have so many ref and reactive in my Home.vue component. I have to pass many of them into a function from composables as parameters, then pass deeper into other composable files.

I feel like I am not taking advantages of composables in Vue 3 at all. Please help and suggest me some better way to solve my problems