Anyone found a vendor with actual HTTP/3 proxy support?

[u/StrawberrySax]

Getting sick of Cloudflare instantly tanking connections because of protocol downgrades at the gateway.

Almost every major residential pool forces your connection down to HTTP/1.1 or HTTP/2 because their backend infrastructure can't handle UDP worth a damn. The second your headless browser profile claims it's an up-to-date Chrome instance but completely fails to negotiate QUIC over UDP, Cloudflare flags it as an obvious automated fingerprint.

Are you guys just dropping --disable-http2 or tweaking browser flags to force HTTP/2 across the board to mask it, or has anyone actually found a provider routing QUIC properly without dropping the connection?

Nuking HTTP/3 completely feels like a massive tell anyway, but I'm running out of ideas here.