Holzohr said The Rockna Wavedream Net accepts native DSD128 via ethernet (maybe Frode can confirm about it) and so (it seems) the LUMIN U1 Transport.Maybe it is an either DoP (limited to DSD64) or native DSD (DSD128 possible) thing.
The WDN accepts 5.6MHz DSD over Ethernet, but it can play up to 11.28 MHz DSD over I2s.