I have multiple forms with many dependants, and these fields are not able to be sorted easily.
The only way I can change the order is to delete dependents and then re-add them back in. Would be great to have a sort option for this list, that you can reorder without deleting and re-adding.
Status: Idea Submitted
See https://community.hubspot.com/t5/HubSpot-Ideas/Re-arrange-dependent-fields/idi-p/15306. Though it’s been in review for a year now.