See the list below for all compatible devices. Some devices use a similar radio channel. This means that you may also be able to control devices that are not on the list. But according to the list, Oppo is not mentioned, but it is not a television. You can find information about suitable remote controls at the following link: https://www.oppodigital.com/support...

Unfortunately, I haven't found any other suitable ones here. Otherwise, you could of course try a Logitech Harmony. But the question is whether it's worth the effort.