To do this programmatically, you need the collection function to get called in custom phtml file so that the product will be shown in the file.

Let’s say we have a module which is named “Magemonkeys_Recentlyview”

For that module, we have to create a block file Recentlyview.php at app/code/Magemonkeys/Recentlyview/Block/

namespace MagemonkeysRecentlyviewBlock;

class Recentlyview extends MagentoFrameworkViewElementTemplate
{
    protected $recentlyView;

    public function __construct(
        MagentoFrameworkViewElementTemplateContext $context,
        MagentoReportsBlockProductViewed $recentlyView,
        array $data = []
    ) {
        $this->recentlyView = $recentlyView;
        parent::__construct($context, $data);
    }

    public function getRecentviewCollection()
    {
        return $this->recentlyView->getItemsCollection()->load();
    }
}

Now we can call that block function in custom phtml file

create app/code/Magemonkeys/Recentlyview/view/recentlyview.html file

$productviewcollection = $this->getRecentviewCollection();
foreach ($productviewcollection as $recentlyview)
{
     echo $recentlyview->getName();
}

Now check the result by clearing the cache.