Ask HN: Why can't Ukraine use LoRA instead of Starshield?

Literally from the Wikipedia page you linked: It's limited to 27kb/s at best, and in practical conditions reaches more like 10km.

LoRa is both low bit rate and low duty cycle. Perfect for widely dispersed vending machines where you can't count on cheap 4G. Useless for drones or missiles.

Why cant Ukraine use toy two-way radios, toy guns and paper planes?

Besides what others said, it's very easy to jam.

bandwidth, security, range