Preventing users from swiping back to earlier questions

Yes you can ask your enumerators not to navigate back and then check if they obeyed using audit feature.

@LN was there any reason why we didn't add that option on a form level?

You need to ask on their forum:

You are right,

When administered by a enumerator, this could work. however, when its self-administered, the audit file will keep track of this. But on extreme cases, there could be a mis-diagnosis of cases due to the changed entries.

This could be a feature to consider for question-level design.