USDZ Exporter vertical tracking

Hi,

does anyone know if the USDZExporter three.js/USDZExporter.js at e84805f25356b6424c7836b66c7a2752c5df74f4 · mrdoob/three.js · GitHub does support vertical (wall) tracking as well?
Scanning through the code I don’t see any setting but am wondering if setting upAxis to “z” three.js/USDZExporter.js at e84805f25356b6424c7836b66c7a2752c5df74f4 · mrdoob/three.js · GitHub would do the trick?

Kind regards