Hi Sreekesh,
Thank you for contacting Syncfusion support.
At present, we do not have support for Image Form Fields in our pdf library. As a workaround, we can add the image using PdfButton field on existing PDF document in our PDF library. When loading the input PDF document with image field, we can get that field as PdfButton field in our end. In that, we could not directly add the images to button fields, we need to add the images (using file path) in appearance of button fields in sample level. Please find the sample from below link,
Please refer the below link for more information,
If you are facing any issue, kindly please share the details such as input and output document, modified sample, product version to check the issue in our end. So, that it will be helpful for us to analyze and assist you further on this.
Regards,
Gowthamraj K