Currently uploading images from your phone library is only possible for a single picture (with the Native Mobile Resources action). It would be nice if you can select multiple pictures from you lib to upload them all at once. The underlying library supports this feature (react-native-image-picker).
Any update on this? Seems like pretty basic functionality is still lacking here. Our users can upload 25 images with a report but currently that's not something our user are willing to do as it is very time consuming right now.