@AB102 wifi dignals strngth is determined bybthe layout and type of construction of you home. This means a small 2 bed cottage with stone walls can be more difficult to network than a modern large home. Many homes require more than a single wifi source my own included. You can help yourself to some extent by making sure the hub is out in the open on a surface above obvious obstructions like radiators. You msy need a longer etgernet cable from the ONT unit to the hub to achieve that.
Aftervthat it is down to looking at getting more kit you could pay Sky for their https://www.sky.com/help/articles/sky-wifi-max bundle or as I did myself buy a whole home wifi set up which need not be expensive.
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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
