CKChinnamunia Karthik Chinna Thambi Syncfusion Team March 7, 2023 12:28 PM UTC
Currently, we do not have the support to search the text
in the comments. We have logged this as a feature request as "Comment
search in the PDF Viewer". We will implement this feature in any of
our upcoming releases and let you know once this feature is implemented. You
can track the status using the below feedback link.