No. you can’t successfully wire a (balanced) XLR connector to a ( single ended) BNC connector for this purpose. Further it would not work for DSD128 even if you could. You have to have dual AES at both ends as each cable carries half of the data. The Chord Dave not only does not have the right number of physical connectors it does not have the ability to recombine the data to a single entity for processing.
If you really want to take advantage of the superior dCS network streaming sound quality and have native DSD128 I would suggest that as the cost of the Chord Dave + a dCS Network Bridge is not far from the price of a Bartok without the headphone option then the latter would be the way to go.