Sorry this might seem stupid. I just started using Duplicacy.
I am using the web UI for Unraid:
https://hub.docker.com/r/saspus/duplicacy-web
When I configured a new storage I was asked to enter a password. I can only assume this was used to encrypt the backup storage.
But what is RSA encryption? Is it used to encrypt the backups or for something else?
Upon restoring from the backup (at B2) I was not asked to enter a password which makes me speculate if the backup is encrypted at all.
It is generally hard to tell if backed up files are encrypted because they are stored in chunks.