How to add to page?

I have the following in a PHP Code widget named “my widget”.

<?php
Echo “Hello, World!”;
?>

I installed “amr shortcode any widget” since there doesn’t seem to be any way to add a widget to a page.

I then pasted this into a page:

[do_widget “my widget”]

All I see in the page is an exclamation mark where the PHP output should display. You have some idea what I’m doing wrong?

Isn’t there a way to get this into a page without having to install another plugin?

https://wordpress.org/plugins/php-code-widget/