Graylog not listening on UDP port?

Question

linux

Good afternoon! tell me why graylog 4.0 is not listening to udp port. As a result, it does not display logs on the web.
Ubuntu 20.0.4
Firewall disabled
port in graylog 10514
if you send a request like "echo 'hello' | nc -v -u -w 0 graylog 10514" from the client, then
netstat -tulpn |grep 10514
udp6 0 0 ::: 10514 :::* 1200/java
udp6 0 0 :::10514 :::* 1200/java
udp6 0 0 :::10514 :::* 1200/java
udp6 0 0 :::10514 :::* 1200/java
udp6 0 0 :::10514 :::* 1200/java
udp6 0 0 :::10514 :::* 1200/java
udp6 0 0 :::10514 :::* 1200/java
udp6 0 0 :::10514 : ::* 1200/java