How to enable Alternate Approver field in Internet Expenses General Information Page?

Hello,

I already opened an SR 3-15779192711 to investigate how to enable the Alternate Approver field on the Internet Expenses - General Information page.

The conclusion on the SR is that there is no such field, and similar functionality can be obtained by setting the normal Approver field as updatable by the user. But I am so convinced that this field did at some point in time exist, I would like to ask here on the community whether anyone can shed any further light on this field. Did this field previously exist, has it been removed in latest versions, is there a way to personalize to have this field appear somehow (though I couldn't find it)? We are on EBS 12.2.5.