Circuitpython and ESP32-C3

Hello
Thanks for listening to me.
I work on the realization of home automation modules to improve my solar houses to make them as efficient as possible.
I have a problem with Circuitphyton.
I manage to flash it with ESPTOOL but then nothing happens, the mu software does not recognize it.
I take this opportunity to ask two other questions:
Can we use the "native" USB port in the current version of circuitpython (which is in Beta version).
And how to assign PINs from the chip to the I2C protocol (there are no dedicated PINs in the base).
Here is my toolchain.
W10/Python 3.7(64)/Esptool V3.2/Node MCU-Series ESP-C3-32S-Kit 4MB
yves