My Sky box just says "Searching for listings"
You will get "Searching for listings" is there is no signal from the dish. Press SERVICES then select SYSTEM SETUP and then SIGNAL TEST.
If you don't have a good enough signal unplug the box from the mains and check the connection from the dish to the box. You might also want to check the dish hasn't been damaged or moved by a storm (or similar).
I would suggest you look at getting a Freeaat box instead. They do not need any subscription nor any kind of 'viewing card'. As it's name implies, Freesat is free to use and there are no charges. Assuming your current Sky box is not a Sky Q type and you have the original LNB fitted to your dish, then a Freesat dish will give a wide range of programmes, see youtube-flat
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