Should I de index these pages..

Writerly said:

Keep your “About Us” and “Contact” pages indexed, so that people searching for your brand information or contact can still find and reach you. If your “Privacy Policy” page is original, you can keep it indexed. However, if you used a generator to generate that text, you want to deindex the page because duplicate content will affect your ranking. You should also deindex pages that have no content, “Thank You” pages, and pages that have little content.

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