The custom feature report templates option in Survey123 is extremely useful, but it could be enhanced by allowing for users to generate reports that combine data from multiple surveys.
Example: multiple survey entries exist for different plot locations, all at one site (so therefore, they would all have the same value for a "site_name" field). Each survey entry has photos attached to it that were taken at the different plots. A report needs to be generated that would combine all of the photos from each plot taken at that site.
This is just one example of many. This feature would be extremely useful for producing summary reports for particular projects.