Hi @Tua2Miami,
Do you want to update the status cell with completed when a user has complete the form?
Could you please share a bit more about your scenario?
Actually you need a Microsoft Form and use the when a new response is submitted, add a condition to check if this user has passed 80%, if yes, add an update a row action the update the status within the cell.
As the second issue, you can't get the link to the form results in Power Automate. Since this link is always the same by Form, I recommend you to get it once and paste it manually in the send email action of the flow:
