My EFI Ducatis all use an temperature sensor in the rocker cover, rather than a CHT per se. So I believe that's probably an acceptable approach, too. They knock out warmup compensation pretty fast. I think 60C is the magic number almost everyone seems to use. Works for me.
Which jibes pretty well with my experience of driving and riding cars/motorcycles with manual chokes for a few decades; you don't need choke for longer than a minute or 3, as soon as there was heat in the heads/valves - you're good... I would always would knock the choke off when pulling away, and just keep RPMs higher at the next couple of stop lights if necessary.
My $0.2; taking temperature reading from the wrong place gives you, well, inaccurate readings. You don't need the whole block to be completely up to temperature.
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If you use the oil temperature, dial back enrichment as soon as you see the oil temperature raise across 140 degrees
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IIRC, my chaincase sensor doesn't read 140 - in any temperature scale, Fahrenheit or Celsius - until the oil temp starts to rise off the bottom stop, which is some 10-15 minutes of running with a big FMOC. Perfectly usable as an axis on the boost control table (eg restrict to wastegate spring pressure only until oil is warmed), but didn't provide readings that made any sense for warmup compensation for me.
I mean, heck, I could
hear the motor running too rich 4 miles from my house. Because the chaincase sensor wasn't reading over ambient yet. But it didn't need trim at all by then.
Your mileage may vary etc.