You can add conditions to your relationships

class User
{
    public function posts()
    {
        return $this->hasMany(Post::class);
    }
 
    // with a getter
    public function getPublishedPostsAttribute()
    {
        return $this->posts->filter(fn ($post) => $post->published);
    }
 
    // with a relationship
    public function publishedPosts()
    {
        return $this->hasMany(Post::class)->where('published', true);
    }
}

Tip given by @anwar_nairi