The usual way is to use uplink share --url "sj://mybucket/Documents/My Wedding wishes list.odt", but you can take a look on experimental web-interface: [Testers Needed] Experimental Web Interface + Duplicati
Or you can configure rclone to mount a bucket to the folder on your PC: rclone mount, this will give you OneDrive-like experience. However, there is not so much GUI options to share a link.
The FileZilla will give you easy drag’n’drop option, and maybe they implement a native share in their interface sometime in the future.