udp-443 via the host mapper

udp-443 👻 sends UDP traffic to port 443 (QUIC, HTTP/3) that would go through this proxy into REJECT. Browsers then retry over TCP (HTTP/2), which usually works better through a proxy than QUIC tunnelled over TCP or over a lossy UDP path. Other UDP (DNS, games, calls) still goes through the proxy.

{
  "xrayJson": [],
  "mihomo": [
    { "op": "set", "to": "udp-443", "value": "reject" }
  ],
  "base64": []
}

proxies:
  - name: 🇩🇪 Germany
    type: vless
    # ...
    udp-443: reject

quic: reject is an alias and works the same way; use one of them.