From LG customer services :-
In regard to the UK on-demand applications, I am sorry, but currently these are unavailable for download. This is the catch-up applications, such as: BBC iPlayer, ITV Hub and 4 On Demand (Freeview Play). Although, apps such as Netflix, Amazon Prime Video and YouTube are still available for download. I sincerely apologise for the inconveniences this will cause.
At the moment, some of our new 2020 TV models could be missing some catch-up apps; however, LG are in the process of working directly with the broadcasters to feature their catch-up players in our 2020 range of televisions.
Discussions are currently ongoing, and a software update will be provided soon. This will be downloadable through your TV via the internet. I would be unable to comment as to when this may be, although I advise ensuring that “Automatic Updates” are enabled on your TV.