@VHK in some situations a simple wifi booster can work. They need to be installed half way between the hub and where you need the boost as they need a decent connection to the hub. In practice thecspeedd they can provide is 50% of the connection speed they have themselves.
If your home is wifi unfriendly because of its l`yout with say lots of floors or solid walls boosters are of limited worth. Here it is better to use a system like powerline which uses the mains cabelling to get the signal to the furthest point and have a wifi access point there. The other alternative is to buy a whole home wifi system which usually do work but are not cheap.
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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
