Not a weird question at all because most MQA DACs so far have their USB interface or ethernet interface do the MQA decoding and/or rendering...
The Pro iDSD is one of the few so far where MQA decoding/rendering is even possible via the SPDIF input...
I guess what you mean to say is that other DACs will only decode/render MQA from their USB input. The interface couldn't possibly do the decoding unless it was custom built around an FPGA, which would amount to the same thing.