Hello,
I had this same issue with the AliExpress G60S Pro remote (which I personally got from Amazon, but anyway)
Thanks to this topic, I was able to make it work, thanks a bunch!
I made this PR, in case you wanna add the remote. Not sure if it is popular enough for you to find it relevant (it is a cheap remote that sort of "got it all", would be surprised if I was the only LibreELEC user to use it).
Cheers.