@Rick42 standard advice when devices do not connect is to tell the device to forget the connection then fully reboot the device and adding it from scatch. Rebooting requires acfull power down process somon a TV waiting until the power light goes out or on a mobile device following the manufacturer's instructions.
If thst doesnt work post details of the devices which are causing issues andcwhatvthe colour is of your Sky. Saying you have "tried everything " is actually very unhelpful as people have no idea what that includes.
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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
