Hi There,
Yes, it's feasible to extract comments from the SharePoint approval process and use them within Power Automate.
Ensure content approval is enabled for the document library. When a user submits an item for approval, the comments they enter are stored in a column named "Check In Comment".
In your Power Automate flow, when triggered by a document change or submission for approval, retrieve the "Check In Comment" column's value for the respective document. This value represents the comment added by the user during the submission for approval.
While the direct user who clicked the 'Submit for approval' might not be immediately retrievable, you can identify the last user who modified the document, which in most scenarios will be the user who submitted for approval. This is achieved by accessing the "Modified By" column.
Please give kudos and mark as solution if it helps.
Thanks,
Sandeep Mishra