Can employees mark "Prepaid" AMEX lines as "personal expense"?

Hi we have different APAC countries configured their AMEX payment types to have different Reimbursement Recipient. For Australia, it's "prepaid", for HK and Kora, it's "employee" and for rest of the countries, "supplier".

We have noticed that for Australia for which AMEX is configured as "prepaid", employees cannot mark the AMEX transactions as "personal expense" - neither in My Wallet or at expense line level. This is not an issue for other countries.

I guess it makes sense that since the transaction has been prepaid, it shouldn't be marked as "personal expense". however, Australia has this requirement so I would like to confirm from the horse's mouth whether this is a delivered design feature.