The article mentioned in the link also provides general information and how to get there once you are in Langkawi Island.
Until I visit this new place for bird watching in Langkawi, I can only share what I know from others, and there is not much information. I guess we have to wait until the MCO in Malaysia is lifted for 2021.
I also managed to do some bird watching at Gunung Raya in Langkawi when I last visit here in mid of 2020 in between the movement control order or MCO in Malaysia.
Until I actually visit this place, this article is done to provide fundamental information about bird watching at Kubang Badak BioGeoTrail for anyone interested.