@Ells73 Moving the hub more central is good, but you should get the same as before the 1Gb/s FF900 service from the sky Hub, so it looks like that cable is bad if you got nothing at all.
Full speed is what sky delivers to the hub over the Fibre connection, Ethernet connected devices if capable will give you that speed, and it is all shared, wireless wi-fi on a device that can do speed's will also show you top speed, and then the further you move away the slower that speed will drop, depending on how well your pods are working similar speeds can be found it all depends on how good the signal is between all three devices.
https://www.sky.com/help/articles/broadband-speeds-explained
And for speed related issues good read.
https://www.ispreview.co.uk/index.php/2020/12/why-buying-gigabit-broadband-doesnt-always-deliver-1gb...
