@rajeeshraj depending on what the smart assessment is connected to you can trigger approval off of that. For example if the smart assessment is connected to a task when the smart assessment is completed you can trigger an approval.
Smart Assessment Automation can also be used to trigger flows and other logic when an assessment is completed depending on questions. Smart assessments are like any other record in servicenow and you can trigger flows off of them when assessments are completed. I would suggest looking at the OOTB attestation flow as an example of how its configured.
