I don't think its likely physical sales overtake their digital, which would need to be true for this to be an ok situation, but something lending credence to that theory is the dramatic steps CGL takes to appease physical retailers, holding back PDFs for months despite them being ready and scheduled to go out for a while because of printing delays to maintain parity.
That said I have talked to a few store owners in my area and SR despite being a popular game around these parts don't move physical copies at all. Like they basically only order one copy to just have it on shelf at this point, and my local store of choice only picked up 4 copies of SR6 anticipating extremely low demand and not one has sold yet.
The plural of anectdote isn't evidence, obviously, but SR doesn't have a lot of shelf presence and its community is very much oriented towards online spaces and play, so PDFs should be expected to be the norm even more than D&D or Pathfinder, which have organized play societies pushing physical books REALLY hard.