Yes, you can map hidden fields with the Typeform integration.
Typeform hidden fields are included in your form’s URL. Here is a video from Typeform demoing how to create hidden fields in your form’s URL.
If your hidden field(s) are not included in the URL of your form, then ActiveCampaign will reject the form and the hidden field data will not be available to map.
Here is an example of a valid Typeform hidden field:
https://layersupport.typeform.com/to/xflQl9Rh#my_baseball_team=Yankees
This is an example of an invalid Typeform hidden field:
https://layersupport.typeform.com/to/xflQl9Rh#my_baseball_team=xxxxx - There must be a value to map the hidden field data
Changes to your form must be published for the hidden fields to be available to map in your account.