Array inside an array using map function React not working - node.js

Question

There are two collections based on user score. The first consist of user score and the list of 500 careers are placed in other collection. I want to show careers based on the user score. Suppose user score is 80 so all the careers that comes under 80 score can be shown to user.
There can be one or more careers having same score.
The report collection is :
{
"score": "80",
"details" : "hello",
}
the career collection is :
{
"number": "1",
"intro": "intro of 6",
"education": "education of 6",
"training": "training of 6",
"career_name" : "Computer Designer",
"career_img" :"marine.jpg",
"abilities": "Loreupm ipsun CAS",
"salary_global":"$90000",
"work_styles":"Loerum ipsum 6",
"scope": "scope of 6",
"image": "https://t4.ftcdn.net/jpg/02/98/58/41/360_F_298584167_WLdKSUF4ZpQxLe4dX1div4tvC41Nd9N0.jpg"
}
I want to display the careers based on the user score.
The collection should be :
{
"score": "80",
"details" : "hello",
"career": {
{
"number": "1",
"intro": "intro of 6",
"education": "education of 6",
"training": "training of 6",
"career_name" : "Computer Designer",
"career_img" :"marine.jpg",
"abilities": "Loreupm ipsun CAS",
"salary_global":"$90000",
"work_styles":"Loerum ipsum 6",
"scope": "scope of 6"}
{
"number": "2",
"intro": "intro of 6",
"education": "education of 6",
"training": "training of 6",
"career_name" : "Computer Designer",
"career_img" :"marine.jpg",
"abilities": "Loreupm ipsun CAS",
"salary_global":"$90000",
"work_styles":"Loerum ipsum 6",
"scope": "scope of 6",}
}
}
How can I do this using mongodb.
I tried:
let advices = await db.aggregate('report', [
{$match :{code: user.score}},
{
$lookup: {
from: "career",
localField: "career",
foreignField: "_id",
as: "career"
}
},
{ $unwind: {path: "$career", "preserveNullAndEmptyArrays": true},
}
]);
This not working. please can you access. There can be one or more careers based on score.
for example: computer science can be shown to user having 120 score , 80 score and 150 score.
This is react code:
{advices.map(advice => (
<>
<Container maxwidth="sm" component="main">
<Grid container spacing={3} direction="row" justifyContent="center" flexGrow: 1 }} key={advice.id}>
<Fragment>
<Grid item xs={12} md={6} sm={6} alignItems="center" justifyContent="center">
{advice.code}
</Grid>
<Grid item xs={12} sm={12} md={12} sx={{flexGrow:1}}>
<div>
**{ advice.career && advice.career.map(carer => (
<li key={carer.number}>{carer.career_name}</li>
))}**
</div>
</Grid>