Something like anchors which is not anchors

We are a bit stuck.  We have a streaming service that be need to consume which only works in OpenXR, but we need anchors which don't work with OpenXR (see https://communityforums.atmeta.com/t5/OpenXR-Development/Unity-OpenXR-OVRSpatialAnchor-Passthrough-Wobbly-models/m-p/1056332)

Unity have confirmed our issue, but have not flagged a release version by which this will be fixed.  As there anything we can use that is anchor like?