I have Denafrips Gaia, also confused as to whether clock inputs work for any external clock. In any case I don't feel the need for any further clocking in my setup, sync/slaved to the fine OXCO clock in Gaia provides me with a wonderful analog/vinyl presentation, can't imagine a less digital presentation.
My experience lends me to believe it possible to overclock a streaming setup. At one point I added audiophile switch to my network, the whole presentation became too precise, far too delineated image outlines, YMMV.
I just got notification on the Laiv unit, could be a winner although it only has Femto clock vs Hermes OXCO.