Pass object to component - vue js - vue.js

Question

I've tried a few different things and now must ask for some help (thanks in advance).
I'm creating a simple Vue js app where a component form emits data as a object (this works) to its parent.
the parent then runs a v-for loop and passes the Object data to a component which displays the data (this does not work).
Vue Version
($ vue --version
#vue/cli 4.4.1)
Parent code:
<template>
<div class="MEDS">
<goalForm #goal_data="goal_create($event)"/>
<section>
<div v-for="(goalItem, index) in this.goals_list_container" v-bind:key="index">
<goalItem :goal="goalItem"/>
</div>
</section>
</div>
</template>
// # is an alias to /src
import goalForm from '#/components/Goal_form.vue'
import goalItem from '#/components/Goal_item.vue'
export default {
name: 'MEDS',
components: {
goalForm,
goalItem
},
data(){
return{
// Recievs goals from goalForm on submit, this is an array of objects
goals_list_container: [],
}
},
methods: {
goal_create(payload){
this.goals_list_container.push(payload);
console.log(this.goals_list_container)
}
}
}
GOAL ITEM (that should display the goal)
<template>
<div>
<h3>{{goal.title}}</h3>
</div>
</template>
export default {
prop: ['goal'],
data(){
return {
goal: {}
}
},
watch: {
}
}
Goal_form: (EDITED)
<div>
<form action="" class="goalForm" #submit.prevent="emit_Goal">
<input type="text" name="title" id="title" v-model="title">
<input type="text" name="description" id="description" v-model="des">
<input type="date" name="dueDate" id="dueDate" v-model="dueDate">
<input type="number" name="priority" id="priority" v-model="priority">
<input type="submit" class="submit">
</form>
</div>
</template>
<script>
export default {
data() {
return {
title: null,
des: null,
dueDate: null,
priority: null,
goal_data: {}
}
},
methods: {
push_goal(){
this.goal_data.title = this.title
this.goal_data.des = this.des
this.goal_data.dueDate = this.dueDate
this.goal_data.priority = this.priority
},
emit_Goal(){
// Move goal details into Object to be Emited
this.push_goal()
// Emit the form to the parent on submit
this.$emit('goal_data', this.goal_data)
}
}
}
</script>
<style lang="scss" scoped>
form {
display: flex;
flex-direction: column;
input {
&[name="title"]{
}
}
}
</style>
The for loop seems to work as each submit of the Goal_form creates a new instance of the Goal_item component.... But it does not populate with any data.
I Am either getting this totally wrong or have missed something small but any help would be greatly appreciated -
W