I used to have a kitchen sink faucet with the mixing handle on the side, that i installed after the 2 tap mixers.
So the 2 taps controlled hot and cold, which fed into the faucets cold line, and the hot line was capped off, making the handle only control flow, and temp was the 2 knobs. (I did this out of laziness because I didnt want to unsolder and resolder in new fittings)
Something like this works. Just turn the water off with the spray nozzle, not the handle. https://share.google/1HpxlLwZ6RMXGdMoS
I used to have a kitchen sink faucet with the mixing handle on the side, that i installed after the 2 tap mixers.
So the 2 taps controlled hot and cold, which fed into the faucets cold line, and the hot line was capped off, making the handle only control flow, and temp was the 2 knobs. (I did this out of laziness because I didnt want to unsolder and resolder in new fittings)