It's the wrong death certificate. They just found someone with the same name and falsely assumed it was her because they listed the wrong death certificate on the FInd a Grave website.
Kamala's grandmother (note the cited death certificate is the one Candace used):
She married Lawford Newland in 1944.
www.findagrave.com
Birth certificate:
She married Lawford Newland in 1944.
www.findagrave.com
ACTUAL death certificate:
The person whose death certificate they're (likely) mistaking for hers:
Discover your family history. Explore the world’s largest collection of free family trees, genealogy records and resources.
ancestors.familysearch.org
The incorrectly cited death certificate in question:
The death certificate they provided doesn't even match with the birth certificate they used for Kamala's grandmother. It's obviously not the same person.
Candace Owens literally looked at two different certificates, assumed that - because the names were similar and someone had attributed them to the same page on findagrave.com - they must refer to the same person
despite the birth date being different, their birth names being different, marrying different people, dying at completely different times and in completely different circumstances and, crucially, ONE OF THEM NOT BEING THE MOTHER OF KAMALA'S ACTUAL FATHER.
Stop falling for this stupid clickbait. Be smarter than this.