Hi Jagjeet,
It is an expected behavior as Approval table does not extend Task table & thus having a restriction to directly access the required details of Task table.
For the Flow issue can you share a screenshot for further check.
For Notification you need to use below.
In case you will you need to have a mail script created from System Notification >> Email >> Notification mail script & use below in the script.
(function runMailScript(current, template, email, email_action, event) {
// Add your code here
//For RITM
if (current.sysapproval.sys_class_name == 'sc_req_item') {
var getritm = new GlideRecord('sc_req_item');
getritm.addQuery('sys_id', current.sysapproval);
getritm.query();
while (getritm.next()) {
template.print('RITM requested for ' + getritm.request.requested_for.getDisplayValue());
}
}
//For Change
else if (current.sysapproval.sys_class_name == 'change_request') {
var getchng = new GlideRecord('change_request');
getchng.addQuery('sys_id', current.sysapproval);
getchng.query();
while (getchng.next()) {
template.print('Change Opened for ' + getchng.opened_for.getDisplayValue());
}
}
})(current, template, email, email_action, event);
Then call the mail script in notification body in format
${mail_script:replaceyourmailscriptnamehere}
