Installed a Ram mount v-shape base to the driver's side grab handle.
Attached a RAM Mounts Quick-Grip XL Phone holder to it with a composite Double Socket Arm
Lots of people are interested in the picatinny rail. But information as of late has been non existent. I ran across this.
It is the Tough Track by RAM Mounts. This one is vehicle specific to the Wrangler/Gladiator. But they do have generic options. Maybe RAM will step up and make a Bronco...