How to capture duration on record external learning to generate different approvals?

Hi all,

How to capture duration on record external learning to generate different approvals based on start & completion date ?
1. for 30 days & less
2. for 30 days & more

What should be the approval rule configuration?

Created a context segment to capture the same but it is populating addition fields. unable to remove them!

 Also , below are the config for the approvals.