I have been building my own wheels and for others for over 25yrs, including at one time owning a Phil Spoke cutter never should have let that go..., and trued and tensioned many more including beside the trail.
I have never heard of a bicycle spoke torque wrench and as I am always into learning something new I did in fact just go to youtube to see a video on them and their use. I must have a different subscription because there weren't any on there other than for motorcycles that I could see. But truth be told I wasn't even aware of their existence. At one time I tried a spoke wrench that had a ratchet inside similar to a socket wrench, it worked ok but the nipple contact wasn't great.
However I have had a WheelSmith spoke tensionometer for years that I use, but quite frankly not all the time. As I am pre-stressing the spokes by squeezing them while rotating the wheel in my stand over the years I have gotten a feel for proper (enough) tension, which can be different for different size rims/spoke lengths btw. I would never trust the nipple to provide an accurate reading as to spoke tension because there can be enough variation there as felt by a plain spoke wrench yet checking with a tensionometer the spokes are within spec. Not bragging but I have had a pretty much 100% success rate and wheels that have lasted until the sidewalls failed from braking friction.
I wish you luck on your quest but if I was you I would just stick with the tried for years and true method.