yes that's true, it shows the header/title but content is available only if you pay.Are you sure you need to pay a subscription to just check if an item is available? What I have found with servicebox is I can check if something is available without paying a subscription and only when I try to open the item it tells me I need a subscription.
I have the installed version of sevicebox which covers cars up to late 2013. One thing I have noticed is there is very little on cars that came out that year but if I look at the online version there is a lot of data. Hence, I wonder if it takes some time before PSA puts that data up on new cars.
car is a 2020 model so the offline diagbox version circulating around is useless afaik.