I wanted to find out if Field Maps supports the storage of attachments captured in the field while in a service area where there is no data connectivity (i.e. offline). My initial tests using airplane mode seem as though I cannot capture any new records once I have attached a photo record via attachments. Thank you for your time.
Yes you can capture photos in offline mode. Make sure your layers and map are offline ready.
This doc has a good walkthrough: https://www.esri.com/content/dam/esrisites/en-us/media/pdf/implementation-guides/take-your-web-maps-...