Does Traefik support 103 early hints?

Referring to 103 Early Hints - HTTP | MDN

From what I can tell, I am unable to get unbuffered response.

A service that is expected to return 103, just returns 200 when it is routed through Traefik.

curl -H 'host:' -D - http://contra-traefik.traefik/gajus
HTTP/1.1 200 OK
Cache-Control: no-store
Content-Length: 11441
Content-Type: text/html
Date: Tue, 26 Jul 2022 19:51:48 GMT
Referrer-Policy: strict-origin-when-cross-origin
Set-Cookie: contra_web_app_service=394e7e912ad85b66; Path=/; Secure
Vary: Accept-Encoding
X-Frame-Options: sameorigin