code_block.antlers.html

<div class="my-2 w-full torchlight-parent">
    {{ torchlight :language="language" }}
        {{ code | noparse | entities }}
    {{ /torchlight }}
</div>

Torchlight.php

<?php

namespace App\Tags;

use Statamic\Tags\Tags;
use Torchlight\Blade\BladeManager;
use Torchlight\Block;

class Torchlight extends Tags
{
    /**
     * {{ torchlight language="php" }}{{ my_code }}{{ /torchlight }}
     */
    public function index()
    {
        $language = $this->params->get('language');
        $code = $this->context->raw('code');

        $block = Block::make()
            ->language($language)
            ->code($code)
            ->theme(config('torchlight.theme'));

        BladeManager::registerBlock($block);

        $render = function (Block $block) {
            return "<pre><code class='{$block->placeholder('classes')}' style='{$block->placeholder('styles')}'>{$block->placeholder()}</code></pre>";
        };

        return $render($block);
    }
}