Unfortunately, this is not possible for this model. There is neither an app store nor any other way to install additional apps. Unfortunately!

Sometimes Philips provides additional apps in an update (operating system), such as the Amazon Prime app some time ago. However, as far as Disney+ is concerned, nothing has changed. This app is not available for this TV model (date: 19 April 2020).

If the question is still open: possibly e.g. Minix Box as an external player...if the app is available in the Android Store.

I don't have the TV on the internet, so I can't help.