@Geordiedan Sky will dupply up to 3 extrnders if WiFi speeds are less than 25Mb/s in every room see https://www.sky.com/help/articles/sky-wifi-max
However trying to play games on a Play Station over a poor WiFi link will still be pretty painful. Suggest you research using powerline networking which uses the mains wiring in your home to carry the data if you want a decent gaming experience.
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65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
