Ceaus the fact you had to enter the number manually is not an issue at all, the website shows just some numbers, it's normal you had to type it if it wasn't in the list.
If you see "civico in area bianca", you have the right to have an FTTH or FWA connection by Open Fiber.
Check on this map if there is a black dot on your home.
If you see the black dot, then you are entitled to have an FTTH connection. In this case, you can try to contact a smaller provider (like Dimensione; @giusgius is a representative here on the forum), because they are better to handle particular situations like your, where the house is far from the main street.
If there isn't a black dot on your home, then you should have FWA coverage by Open Fiber.
It has nothing to do with TIM, Vodafone or WindTre, it's a connection built by Open Fiber to reach locations inconvenient to reach with FTTH. You can expect to have stable 100 Mb/s download speed with it (and 50 Mb/s upload speed).
There are just some small providers that sell FWA by Open Fiber, Aruba is not one of them, while Dimensione is it, so you can verify with them even in this case.
