Best ir blaster for HA?

ESPHome? Do you have a configuration file?

This is to use the IR of the device:

remote_receiver:
  pin:
    number: GPIO14
    inverted: true
    mode:
      input: true
      pullup: true
  dump: lg
  
  
remote_transmitter:
  pin: GPIO4
  carrier_duty_percent: 50%

button:
  - platform: template
    name: "David LG TV on/Off"
    on_press:
      - remote_transmitter.transmit_lg:
          data: 0x20DF10EF
          nbits: 32

I have officially given up on this project. Looks like I wasted money on AlliExpress.

Looks like it was fixed, you might want to try again