Yesterday I created a new email on my iPhone and wanted to attache a file from online nextcloud file storrage.
I was a bit surprised this is not possible.
Luckily I had the old owncloud ios app installed as well. And then it’s possible.
So what I did:
Open email app. Read email. Reply on a message. Click somewhere in the message till popup apears. Then you can select attache document. A new screen will apear where you can choose from which app. Then pick nextcloud/owncloud app. Browse to the file you want to attach. Click op insert.
Ready.