You use micrpython when you have lots of horsepower and need something fairly robust on the network.

You use C/C++ if you need precise control over power, memory or CPU. Even though if you're doing network stuff its much harder to do quickly and securely. (THere might be better embedded TLS support now)

Lua is frankly just sparkling C. Sure if someone has create a bunch of libraries for you, then great, if not, you've now go to support lua toolchain, and your own microcontrollers toolchain, and port what ever control lib the manufacturer provides yourself.

Or, as this is a marketing page, pay https://realtimelogic.com/products/xedge/ to do it for you.