Hi @v-xiaochen-msft ,
for the steps, I basically follow from this website.
Regarding your question, I want to update at column "Invent_Title" from "DatacardValue2"

It is the 5th Column next to attachments

Regarding Files.Attachments , yes the user manually upload files where it will be updated at sharepoint also.
Usually for text, I use the patch function where all the text will be updated to the SL, but I cant find a way to do the same with attachments. So I use Power Flow to be able to update the attachments in SL. But when I use patch function for text and power flow for attachments to update SL, it will create two separate Row, One for the attachments, one is the patch.

Right now I am trying to find a way to update text to sharepoint list using power flow and make sure the input text and the uploaded file will be in the same row. Is there any way that I can navigate this?