Using the Android app stateside for the first time I can see how so many observations upload as unknown. In the field I did not have Internet nor the time to ID. Once I returned to WiFi the observations automatically began uploading. Although I paused the upload, with the uploads partially begun and paused I could not edit the observations. So the observations are going up as unknowns. And uploading only slowly, and one appears to have lost its image, another one appears to have an incorrect time stamp. Please pardon me for not citing links, the uploads are still occurring as I write this. The app works better connected, working one observation at a time - the way I have used the app in the past. Might be another set of reasons for so many unknowns going up, even for a non-power user such as myself.
Post-script: the observations uploaded, the photo which was not visible in the app appeared when checked from a desktop. I am working on the unknowns.
https://www.inaturalist.org/observations/27331357
https://www.inaturalist.org/observations/27331569
https://www.inaturalist.org/observations/27331745