I’ve been on the lookout for an RF Blaster that works over ZigBee for a while now. Most of what I find, especially on AliExpress and Amazon, are based on Wi-Fi instead of ZigBee.
Currently, I’m using ZigBee2MQTT for controlling my AC with the Tuya ZigBee IR Blaster, and it’s working flawlessly! If anyone has come across a reliable ZigBee-based RF Blaster, I’d really appreciate it if you could share your findings. 
Thanks in advance!