How do I sync my camera's image gallery?

I’ve taken some pictures today with my new Fairphone, running /e/. When I got home I enabled wifi and told my 'phone to sync with my e-cloud account. It indicated activity on each class of sync-able data, including “Pictures and Videos”. That account now shows a test note I created in my Notes app, so clearly at least that got synced, but the online e-cloud view of my account shows no sign of any images. It has no “Pictures and Videos” folder, but it does have an (empty) Images folder.
I don’t know where to find the data that was allegedly synced !

I have problems uploading fotos with the build in sync function as well.

As e-cloud is just an nextcloud instance, the Android nextcloud app works just fine and is even more configurable.