Ok, I succeeded.
The MG 4 does not have Automatic Relearn or Stationary Relearn. Sensor relearning can only be done via OBD (That's what Autel says).
So I bought an Autel TS501 from Amazon, because I want to be independent from the tire dealer, it's not that expensive. However, a tire dealer should guarantee this work.
On the TS501 there is the EU model MG MG4 09/2022-06/2023 433MHz which then allows you to communicate with the car's OBD and update the codes in ECU, but in my case I would like to clone the original sensor IDs.
I scanned every original sensor from the wheels in the correct position (FL,FR,RL,RR), and simply copy the code in the new sensors. The sensor to be programmed can be mounted or unmounted in the alloy, the programmer can easily write it anyway.
The sensor ID is a simple hexadecimal code and can be generated from scratch. The important thing is that the code corresponds to what is saved on the ECU.
Please note: The TS501 can program compatible universal sensors or MX-Sensors.Other brands can write their own sensors, but read every sensor