@Claire002 it should be possible by following these instructions https://www.sky.com/help/articles/find-and-change-your-wireless-password but if at all possible dont use an iPhone or iPad as there is an issue where the web interface doesnt accept changes if you have no other device use Chrome rather than Safari.
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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
