Unfortunately not and there are no plans to develop for this at the moment. We did have a Samsung Smart TV app for models between 2015 and 2020 but that has also been discontinued.
LG and Samsung do not use the same operating system, which is why the Samsung TV app would not work for LG. Samsung uses the Tizen operating system and LG uses WebOS.
If you want to watch visual radio for then you can do so via the Smart TV app from KIJK!. It works on both LG and Samsung.