I cannot join any of the default servers provided on Minecraft Bedrock Edition. This includes servers like Mineplex, CubeCraft, Hive, Mineville and the few other default ones.

I just can't join any default servers. I updated my Minecraft to 1.16.201 and a few days later updated to iOS 1.14, and did my normal sign in procedure(because I play on a school iPad, there's a process I need to do) but when I clicked the 'Servers' tab the descriptions of the servers didn't show up and when I clicked the 'Join Server' button for the Mineplex server a 'Connecting' message was displayed and then a few seconds later changed to a 'Disconnected From Server' message. The same thing happened to all the other main servers. Meanwhile, my own personal server works when I don't do the sign in process(but the other default ones show their description, but still don't connect).