nodejs how to add result of sub request to my main request

Question

I am trying to retrieve my blog posts and categories (tag) via my database.

I make a first query to retrieve the list of my blog posts and then I create a new query to retrieve the tags of my posts (as they are on a different table)

I have a table : blog, tag, blog_tag ( which makes the join of the two previous tables).

My question is how can I add my tag object in my Results.tag variable?

Thank's in advance

app.get("/api/get", (req, res) =>{

    bdd.query("SELECT * FROM blog limit 2", (err, result) => {
        if(err){
            console.log(err)
            throw err; 

        }else{
            
            result.map((element, key) => {
                result[key].tag = []
                bdd.query(`SELECT tag.id, tag.name AS 'categorie', blog_tag.blog_id AS 'postId' FROM blog_tag JOIN tag ON blog_tag.tag_id = tag.id WHERE blog_tag.blog_id = ?`, element.id, (err, result_tag) => {
                    if(err){
                        console.log(err)
                        throw err; 
                    }
                   // I'm trying here adding my tag to each blog articles
                    result_tag.map((tag) => {
                        if(tag.postId === element.id){
                            result[key].tag = [...result[key].tag, tag]
                        }
                    })
                })
            })
            console.log(result)
        }
        res.send(result)
    })
});