Yes, you may ingest Dolby Atmos files in the ‘Create Release' flow (Professional tier membership required). A stereo audio master is required as a default in order to ingest a Dolby Atmos file in the 'Create Release’ process. Both stereo and Dolby Atmos files must be the same composition and have the same track length or the submission will be rejected.
Currently, Venice delivers Dolby Atmos files to iTunes/Apple Music only. Delivery to other music platforms who accept Dolby Atmos files will made available in future Venice updates.