I am no towing expert. And as above said never trust some guy on the internet.
With that out of the way I've never heard of a "law" or "requirement" that you MUST use sway and/or WDH. Pretty much every state has something like a 2500lb limit to require brakes and if you don't that will get you some trouble.
Read your owners manual carefully. It may mention towing limits with and without a WDH. For example my Silverado 2500HD has two numbers listed They just happen to be the same "1500 lbs with or with out distribution". My wife's blazer only say "Max tongue weight 450lbs". As her CUV is a uni-body I'm not surprised no mention of WDH.
I found this quick towing guide from Ford. There is no mention of WDH. And while your Ranger is light, 750lbs max tongue weight is not all that much.
https://www.ford.com/cmslibs/content...nger_Oct15.pdf
Jim M.