You need to create these files with the command provided in my previous reply or manually.
modprobe will process any file with the extension .conf present in the directory.
The name of the file is up to you.
I think this must be done in the sys-net template.
It’s with sudo modprobe 8821ce but you must blacklist rtw88_8821ce so that the network controller use the 8821ce.
You can use lsmod | grep 8821 to check that the 8821ce module is loaded.
Check with lspci -k in sys-net if everything is good.