Comments change the template name

That comment is what makes a file as a (custom) page template. Relevant excerpt from Creating Custom Page Templates for Global Use:

To create a global template, write an opening PHP comment at the top
of the file that states the template’s name.

<?php /* Template Name: Example Template */ ?>

And the tutorial actually says, “the name of the template that appears in the Page Attributes section of the WordPress page editor is defined using the Template Name string”.

So, whatever name you define there would be the name used in the templates dropdown. E.g. Template Name: Archive2 would assign the template name to Archive2.

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