Dont

Do I need to escape get_the_post_thumbnail function?

Do I need to escape get_the_post_thumbnail function?

No, you don't have to escape the data. And it doesn't need to be escaped. Please take a look at the_post_thumbnail() function, it didn't do any escaping.

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Restricting displayed posts to posts from only select authors
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Menu Easiest way to add dropdown to a page
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