Hi
You can try my customized uqmi.
Download and install with:
wget https://github.com/mrhaav/openwrt/raw/master/22.03.5/uqmi_2022-11-29-0.10_mipsel_24kc.ipk
opkg install uqmi_2022-11-29-0.10_mipsel_24kc.ipk
Other MR6400 users has used this version.