Laravel, how to convert a collection object into a builder object

A better way to do this is to build paginator object manually using the existing collection.

From the docs:

Sometimes you may wish to create a pagination instance manually, passing it an array of items. You may do so by creating either an Illuminate\Pagination\Paginator or Illuminate\Pagination\LengthAwarePaginator instance, depending on your needs.

The Paginator class does not need to know the total number of items in the result set; however, because of this, the class does not have methods for retrieving the index of the last page. The LengthAwarePaginator accepts almost the same arguments as the Paginator; however, it does require a count of the total number of items in the result set.

In other words, the Paginator corresponds to the simplePaginate method on the query builder and Eloquent, while the LengthAwarePaginator corresponds to the paginate method.

Building on what Alexey said, as alternative, you can build a Paginator from a collection manually. This is a simpler way without the waste of an additional query. e.g.

 // Collection $collection
 
$perPage       = 10;
$currentPage   = Illuminate\Pagination\Paginator::resolveCurrentPage() ?? 1;
$itemsOnPage   = $collection->skip(10 * ($currentPage-1))->take($perPage);
$paginatorPath = Illuminate\Pagination\Paginator::resolveCurrentPath();

$paginator     = new \Illuminate\Pagination\LengthAwarePaginator(
        $itemsOnPage,
        $collection->count(),
        $perPage,
        $currentPage,
        ['path' => $paginatorPath]
    );

Then in your view,

        {!! $paginator->render() !!}