Upstream proxy using QUIC

[Maxime Bruno]

Hello,

I'm currently trying to setup a proxy using nginx server. I want it to 
have a QUIC (and so HTTP3) connection between the client and the load 
balancer and also between the load balancer and the backend.

But I achieve, following the nginx doc only in the setup of a QUIC 
connection between the client and the load balancer and a TCP+TLS 
connection between the load balancer and the backend.

Moreover despite the headers, when I try to connect to my load balancer 
with my web browser it don't upgrade my TCP+TLS connection to a QUIC 
connection.

Information:
I'm positive that my load balancer and my backend handle QUIC, I try 
them using curl and the option --http3 and verbose and I check that 
HTTP3 was indeed use.

Can someone help me, or redirect me to another mailing list or forum 
that answer my problem and that I missed. I would be grateful.