@Amandapanda123 iPhones complain if they are not connected to a service using WPA3 the problem is very few other devices can cope with WPA3 as their chips only support WPA2. The vast majority of routers including the black Sky hubs only offer WPA2 which is considered secure by the industry so unless you are a target of a state security service or similar I really wouldn't not worry. However the new white Wifi Max hub Sky have recently introduced support WPA3 then the only issue is replacing all of your other devices wiith new equipment thst supports WPA3 so your iPhone is happy.
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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
