A.
anwered by: canteau
This DT Swiss XDR Freehub Body for Ratchet Drive Hubs is compatible with Q/R or 12mm thru-axle hubs, however it includes a drive side 12mm endcap only.
For Q/R applications you'll need a drive side XD compatible endcap which is different that the Shimano or Campagnolo endcaps.