yes and no. The TLS records are transmitted in CRYPTO frames, which form a crypto stream (just like a TLS stream) that is more or less transparent to the QUIC s

yes and no. The TLS records are transmitted in CRYPTO frames, which form a crypto stream (just like a TLS stream) that is more or less transparent to the QUIC stack. QUIC implementations forward an arbitrary datastream from the peer into the TLS library, and place the data that is produced by that stack again onto the ordered bytestream. There's no record layer for CRYPTO streams - that one would again be above on the TLS layer.