Duration.days between function doesn't work in the job offer approval rules

Summary:

Duration.days between function doesn't work in the job offer approval rules

Content (please ensure you mask any confidential information):

Hi experts,

I am stuck with the rule where I need to use a Duration.days between function but it doesn't work as expected.

I expect to get days but it returns a date.

Could you please help in solving this problem?

This is urgent.

Thanks,

Volodymyr

Version (include the version you are using, if applicable):

23D

Code Snippet (add any code snippets that support your topic, if applicable):