After lots of research, I went with this one for my 2016 JK so I could mount a winch and also flat-tow.
https://www.rockhard4x4.com/product_p/rh-5009.htm
Very few advertise that their bumpers are suitable for flat towing - although many have brackets for shackles.
Looking at the picture, my (Blue Ox) tow bar attachments are to the brackets just outboard of each shackle. The safety cables attach to the shackles.
(That photo is from the manufacturer's website.)