I'm not a KuCoin user anymore, but is it his/her account that's actually restricted or was that a pop-up for everybody? It looks like it's not referring to a particular user but to all of them. It looks like a general reminder especially because the deadline is set exactly one month later.
I am not also sure. But the last time I get such message from Binance, it was because I set the VPN to United States that Binance.com is not available. The message was very similar but I was left with the option to go for the third (which I think is the advanced) KYC verification.
Another reason is Kucoin is not available in United State for a very long time ago.
I decided to check DiMarxist posts just now, I noticed he is a Nigeria.
Anyway, OP, Trump winning the election isn't like a wave of a magic wand. The state of things won't just change overnight. KuCoin is registered in the Seychelles in Africa. It might one day serve the US market though, but it will still go through a lot of process.
Process like having .us domain and more.