Electric cooling fan switching points:

For A/C system:

⇒ On When vehicle speed is 50 mph (80 km/h) or less and ambient
temperature is 28 °C (82 °F) or more

⇒ Off When vehicle speed increases to (62.5 mph (100 km/h) or ambient
temperature decreases to 25 °C (77 °F)

For engine cooling during normal running:
⇒ On 100 °C (212 °F)
⇒ Off 94.5 °C (202 °F)

For engine cooling at ignition off (to counteract heat
soak):

⇒ On If, within 10 seconds of ignition off, intake air temperature is 60 °C (140
°F) or more and engine coolant temperature is 110 °C (230 °F) or more
⇒ Off After 10 minutes or if engine coolant temperature decreases to 100 °C
(212 °F)

So yep, it will come on when AC is on and engine is a certain temp and ambient is a certain temp, it will also come on at 212F, and it will also come on after truck parked if needed.

If your coolant temp is getting to 212F, at 45 mph or so, and electric fan is coming on, it is not the clutch. You could have a partially clogged radiator, cold on bottom, hot on top, instead of warm top to bottom (within 10-20F). You can use a scanner or an ultra gauge to know what temps are going on inside the engine.