I use the Arduino Lab for MicroPython to program my MicroPython devices and do not have a problem in this area.
I'm afraid you seem to have misunderstood my issue, probably my fault for mentioning MicroPython, but my problem is getting the Arduino IDE 2.3.2 serial monitor to recognize the \n in the string and put the following input on a new line. Just like the serial monitor does with a string in a sketch. I can't really explain it better than I did in the OP if you ignore the references to MicroPython, so I have edited the OP to remove the MP references.