Did you look at https://metacpan.org/pod/distribution/Template-Toolkit/lib/Template/FAQ.pod#How-can-I-find-out-the-name-of-the-main-template-being-processed?

In reply to Re: Template Toolkit - Output Template Name / Filepath as HTML Comment by 1nickt
in thread Template Toolkit - Output Template Name / Filepath as HTML Comment by cjoy

Title:
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