I’m using a cloud storage service called Tresorit (encrypts all files by default). It does not show up in the share menu from Drafts. I asked their support who verified and said there was nothing they could do.
Tresorit appears in the share menu of the Ferrite app (iOS audio editor) with two actions on ios 13.
Is there a workaround to share to Tresorit from Drafts?
@sylumer is probably correct that Tresorit is looking for a file, not just text. You can try this Share as File action that creates a file and shares that instead of the text.