Add/Edit Standard Infotype in ESS with workflow

I have a requirement in portal ESS.

If employee add/edit infotype 0002,0006,0009,0021, and 0022, it needs approval process from HR Admin employee. HR Admin can approve / reject. And for each step (submit,approve,reject,cancel,resubmit), there is notification email to the employee and HR Admin.

Can I use portal ESS standard Personnel Data (add/edit) to achieve that requirement? or should I create custom webdynpro application with workflow ?

Is there any exit in ESS standard so that I can insert my custom logic?

Is the approve request can also be implemented in portal ESS standard application for infotype 0002,0009,0021, and 0022?

Thank you 😊