Of course I can share the files I created. I have an Haier TV that I couldn't control with the existing profiles (could be my mistake) and a Topping DX3Pro DAC for my audio. For anyone interested in the Topping codes, those should work for all Topping devices.
About simple text importing, I first created a .txt file with the syntax detailed in your linked post but on the Windows app, I couldn't import anything else than files with a .json extension. For this reason, i tried to mimic a json file already present on the Brands tab.
Haier - LDF40V280S.json
Topping - DX3Pro.json