Can't find HTML Snippet in Profiles (Drupal)
This is available under Misc (Undelete, PDFs, Limits, Logging, Captcha, etc.) (CiviCRM >> Administer >> System Settings >> Misc (Undelete, PDFs, Limits, Logging, Captcha, etc.))




  Note: Try clearing CiviCRM cache if you still unable to see it under
  Misc.


HTH

Pradeep