I am aware of how to make global adjustments (I've done that training already), but I am looking for options for local adjustments such as reducing the exposure of a bright window frame without reducing exposure to the entire image. Is it even going to be possible in any of the Creative Cloud Mobile Apps? I know apps like snapseed can but I'm with Lightroom CC so am not interested in exporting to 3rd party apps.
You can't currently make local adjustments in LrMobile, though I expect Adobe would be working on it. However, there are other CC mobile apps like Photoshop Fix or Photoshop Mix which may help. I think Fix might be the one to try first, but I've not used it much and there may be another app which does the job.