Is there support for users to bring in their own WMTS layers for labelling on the platform?

I’d like to use labelbox to substitute our geospatial labelling in QGIS. We have set up a LiDAR WMTS for the UK as we do labelling across a 1% grid of 1kmx1km tiles to get a good geographic mix of the country. It would be very annoying if we can only use Labelbox by having to crop these images and then upload them into the system. Does anyone know if we should be able to use our WMTS/XYZ link as well as our 1% national grid vector and enable labelling of objects within these tiles as such?

Only these geospatial formats are supported: Import geospatial data