As an update to the previous comment since 5.3.3 of ACF Pro you can pass a true
bool to the_row / get_row i.e. the_row(true)
This will output your keynames as expected and originally explained in previous comments
This is explained in the docs found here: https://www.advancedcustomfields.com/resources/get_row/
cc @davidcie
Thanks James,
I reported this through a support ticket also and Elliot replied and updated the clone field documentation to reflect this behaviour / support
For anyone wondering about this it’s not currently something which can be implemented due to the way key names are setup. It’s my understanding that if the change was to be made to support this it would be a “breaking” change in ACF for users who currently have cloned fields on their setups
Cheers