LTE USB dongle Huawei datacard driver on macOS Mojave
You may be missing the following .kext driver:
/Library/Extensions/HuaweiDataCardDriver_10_9.kext

for the Huawei E3372 modem (aka Megafon M150-2).
As explained in this excellent blog post, you just need to download the driver for your macOS version:

macOS 10.14 Mojave
macOS 11.15 Catalina

and install it.
Note that the driver for Catalina won't work with macOS 11 &quot;Big Sur&quot;.