UBX is a proprietary message format only found on u-blox modules. The Torch uses the UM980. You will need to enable a handful of RTCM messages and then go through a post processing step to obtain RINEX using RTKLIB.
This is very similar to the LG290P (also not u-blox) issue discussed here. Obviously the commands are wholly different, but the Torch currently supports the enabling of a whole host of RTCM messages. I just don’t know which ones to tell you to enable to get to a PPP CSRS solution.
To make this easier, we really need a ‘Surveying Defaults’ akin to the original RTK line that enabled the u-blox RAWX and SFRBX messages, but for the Torch and Postcard. I’ve created an issue here to add that feature but it may be a good bit before we can get there.