No the bumper kit comes with the bolts and nuts needed. When you mount the new heavy skid plates it will really help with the support of the bumper. If you use the proper block and tackle set up it doesn't put as much stress on the bumper.
I have the DV8 spec series bumper. Love it. I also did the JKS max tire clearance crash bar removal at the same time. The crash bars look terrible with this bumper.
This bumper comes with the sensor holes already in it. I don't have the sensors , comes with plastic plugs to fill the holes. If you zoom in you will see the holes. I have a battery cut off key for the winch in one of them.
I went with the DV8 Spec series bumper.
https://dv8offroad.com/collections/spec-series-bumpers-half-ton-trucks/products/6th-gen-bronco-winch-front-bumper-spec-series