Create and use a simple individual routing aspect "ContentElementIdAspect" to have URLs without cHash parameter. It only validates, if the given value does exist in database. Of course, you can even do some mapping and unmapping to not show the uid in the URL, but replace it with another unique value or combination.

config.yaml

# enable aspect in your routing configuration
routeEnhancers:
  MyExtensionRouting:
    # In the example, I use the Extbase routing enhancer, but the aspect should work with other enhancers, too.
    type: Extbase
    extension: MyExample
    plugin: Foolist
    routes:
      - { routePath: '/fancy/{cid}/', _controller: 'Foo::list' }
    aspects:
      cid:
        type: ContentElementIdAspect

ContentElementIdAspect.php

<?php
declare(strict_types=1);

namespace Vendor\MyExample\Routing\Aspect;

use TYPO3\CMS\Core\Database\ConnectionPool;
use TYPO3\CMS\Core\Routing\Aspect\StaticMappableAspectInterface;
use TYPO3\CMS\Core\Utility\GeneralUtility;

class ContentElementIdAspect implements StaticMappableAspectInterface
{
    public function generate(string $value): ?string
    {
        if ($this->isValidContentElementUid($value)) {
            return $value;
        }
        return null;
    }

    public function resolve(string $value): ?string
    {
        if ($this->isValidContentElementUid($value)) {
            return $value;
        }
        return null;
    }

    /**
     * Validate, if $value is a valid uid in tt_content
     *
     * @param mixed $uid
     * @return bool
     */
    protected function isValidContentElementUid($value): bool
    {
        $queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)->getQueryBuilderForTable('tt_content');
        return (bool)$queryBuilder
            ->select('uid')
            ->from('tt_content')
            ->where(
                $queryBuilder->expr()->eq('uid', $queryBuilder->createNamedParameter($value)),
                $queryBuilder->expr()->eq('CType', $queryBuilder->createNamedParameter('list')),
                $queryBuilder->expr()->eq('list_type', $queryBuilder->createNamedParameter('myexample_foolist'))
            )
            ->execute()
            ->rowCount();
    }
}

ext_localconf.php

<?php

// register aspect
$GLOBALS['TYPO3_CONF_VARS']['SYS']['routing']['aspects']['ContentElementIdAspect'] = \Vendor\MyExample\Routing\Aspect\ContentElementIdAspect::class;