Does redis support UDP between server and client

No, the Redis protocol, RESP, is TCP based:

Networking layer

A client connects to a Redis server creating a TCP connection to the port 6379.

While RESP is technically non-TCP specific, in the context of Redis the protocol is only used with TCP connections (or equivalent stream oriented connections like Unix sockets).

What you could do is use a UDP proxy, but I'm not familiar with anything like that.