Can i know how to update I797 in CGI portal

I have visa drop box appointment in Feb2023. I have not submitted my DS-160 i can able to update my new I797 but i am not able to see the information regarding the i797 in CGI portal how can i able to update can you please guide me

You need to submit a new DS-160 with the new I-797 and carry copyvof old and new DS-160 to your Dropbox appointment.