Can anyone confirm a working (ROS7) LTE/5G (4G ok too) USB stick <$80 that's actually available?

I can only find the Huawei E3372h-325 and it seems it's not supported (or at least, not easily).

Since CHR is running as a guest virtual machine it can’t access the LTE/NR device directly through ROS. This means device management has to be handled by the host OS and then passed on to CHR as a regular network device.

So you’ll need to find an LTE/NR device that’s compatible with your virtual host OS and can be accessed as a network device by the virtual machine.

I'm not sure that's necessarily true. KVM supports USB passhrough. So nothing on host required and for CHR instance it looks just like a regular USB device directly plugged in