See my comment on the sibling comment (https://news.ycombinator.com/item?id=33137160). The Chrome HTTP/3 stack works very well - the different boxes shown here are more about lower layers not being tested at all. Same goes for the Apple stack.

This lists Chrome as having almost all features unsupported.

Is that a bug or is Chrome not implementing these features?

Chrome is implementing them, but the test setup doesn't test it the same way it tests the other implemmentations. The reason here is likely that the Chrome QUIC stack is hard to use as a standalone low level QUIC library, and so the test just tests on the highest layer (HTTP/3). I assume one could build a test harness around the Google QUIC library (also called Quiche, and buried somewhere in the Chrome network stack), but nobody invested the time to do it.

Yep and that sucks. I wanted to use quic in an Android App and thought that was going to be a no-brainer, given that Google is the main force behind the technology. Lol stupid me. There is no quic support even on the most recent Android/SDK, as Google really only needs it to shove ads in your face as fast as possible.