I added a basic support for raw Wearable Sensing .csv files:
https://github.com/brainstorm-tools/brainstorm3/commit/534e7dc70d332296aa88fa2685bf256dcf4136f9
When selecting "Review raw file", you can now find "EEG: Wearable Sensing" at the end of the list of supported file formats.
I don't know how to identify events from this file format. If you have any information about this, of anything does not work as expected, please let me know.
For the Matlab files: if this does not correspond to any standard file format, you will need to rewrite them with only one field containing the data matrix.