Is this statement true about certification campaigns?

Yes, a certification item can be reassigned multiple times during a certification campaign. If a reviewer is unable to certify an item or needs another individual to review the access, they can reassign the certification to a different reviewer. This reassignment functionality allows flexibility in handling access certifications and ensuring the right person evaluates the access. There are no limits on how many times an item can be reassigned, making it a versatile feature within the certification process.

References:

SailPoint IdentityNow Certification Reassignment Feature Documentation.

SailPoint IdentityNow Certification Workflow Guide.