How I can sort by relevancy against my searchterm in Laravel upon fulltext search?

In a laravel project I have this migration:

use IlluminateDatabaseMigrationsMigration;
use IlluminateDatabaseSchemaBlueprint;
use IlluminateSupportFacadesSchema;

return new class extends Migration
{
    /**
     * Run the migrations.
     */
    public function up(): void
    {
        Schema::dropIfExists('posts');

        Schema::create('posts',function (Blueprint $table){
            // More columns will be added in next migrations.
            $table->id();
            $table->string('name');
            $table->fulltext(['posts']);
        });

     
    }

    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::dropIfExists('posts');

    }
};

And this Model:

namespace AppModels;

use IlluminateDatabaseEloquentFactoriesHasFactory;
use IlluminateDatabaseEloquentModel;
use AppModelPost;

class Post extends Model
{
   use HasFactory;
   protected $table="posts";
}

And I search as fulltext in a controller:

class PostController extends Controller
{
  public function search()
  {
     $searchterm = $request->get('searchterm');
     $qb = Post::query();
     
     if(!empty($searchterm)){
         $request->whereFullText(['name'],$searchterm);
     }

     $page = $request->get('page')??1;
     $limit = $request->get('limit')??20;

       $results = $request->offset(($page - 1) * $limit)
            ->simplePaginate($limit);

     return new JsonResponse($results,200);
  }
}

But how upon my controller can I return the results order by relevancy? I want the closest matching to be the first ones.