Can you split ONE payment to charge from multiple cards using AMAZE?

Theoretically no issue - but practically, building the user interface on the app to allow for the intricacies of this (eg you would capability to set up charging in advance of authorisation request, and in addition allow selection of the amount to charge to different accounts) - sounds like a decent amount of work for a use case that is of benefit to very few users.

Given the feature development wishlists and limited IT resources - I expect this won't be supported in foreseeable future.

Note - for face-to-face transactions, most POS systems will support this type of split tender payments so when paying in person, just ask the vendor to split the bill.