It didn't work for me. It failed and said something like this update is not for this device. I went back the stock C432 9.0.1.191 after extracting 9.0.1 and flashing 3 files from AEX based on android 10. I flash C432 from official US version C567 version 8. When I tried to flash C432 9.1 it failed. I guess I am stuck at 9.0.1 for C432.No I did not root my device. I think you can go back to stock by booting into recovery and select the `Download latest version and recovery` option.
I suspect something on the phone is not completely C432 EU version, when I used the beta-flashy. Not sure who have knowledge on this., to completely make my phone C432 EU version.