Hello,
I guess you need to install the package firmware-libertas.
It contains the firmware for your SOC.
https://packages.debian.org/trixie/firmware-libertas
apt install firmware-libertas -y
sudo modprobe mwifiex_sdio btmrvl_sdio
Then check if the card is recognized now
dmesg | grep mwifiex
If yes, then you should be able to config it now via dietpi-config