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the post I was replying to was - 2013 ES300H. Not sure I understand your question but most sensors arej capable of showing actual pressures. For whatever reason not all vehicle ecus are set up to show them.
You are right. The signal interpretation and display are ECU task and dash display. Those are vehicle model/yr/configuration based. Initially [in some make model] all 4 or 5 wheels sensors would combine to light up the lowAirPressure. Later advancements have all 4 wheel individual pressure being displayed [ex 2011 RX-450H]. I still have to figure out which displayed pressure is from which wheel.
Some cheap aftermarket brand called Geartronics i bought off Ebay.
I used an Autel 408 to perform all relearn procedure into the factory ECU to rewrite all the numbers again because I could not use this function on my version of Techstream.