When we give resignation, do we get auto generated resignation acknowledgment mail or manual ?

Can you share your registation mail format? I am also leaving TCS soon and thos might help.

Supervisor and then HR two approvals are required, after that you will get auto-generated emails to tcs and personal email

You get the acknowledgement mail only after its added in italent by the supervisor. The acceptance mail happens only after supervisor, next level and final hr approval.

Not sure