New feature "set expiry alert" - BUT WHERE IS IT?

CONCLUSIONS: (after a couple of emails back and forth with Kevin, with thanks!) 

1. Old and new items now seem to show the Alert drop-menu when using this new Date field. 

2. Per item, you can only have ONE Date Alert. (A feature request exists to allow additional Alerts if the user has several Date fields set and wants them.) 

3. Date formats (during both edit and final display) on both the Date field and the Alerts themselves need fixing, as they don't follow the users' system setting. (Much of the world uses either dd/mm/yyyy or yyyy.mm.dd – so this is confusing, especially when editing dates.) 

[4. There may be an issue with what happens when the actual Alert goes off. This is a separate issue on the thread above. Or see here: New Feature "Expiry date" - Where is the alert?] 

Thanks goes to kevin_li for their help in these matters.