@Thomas116 if the hub is losing connection occasionally at night that is likely to be due to essential maintenance but that would not explain loss of service literally every night for many weeks.
You need to call `sky and calmly tell them thst you have a major issue which requires investigation. A reboot will sort minor issues so you need the emphasise thecrepition of the issue.
=========================================================
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
